In a phase 1-2 trial, 27 young patients with r/r neuroblastoma were treated with GD2-targeted, 4-1BB- and CD28-costimulated CAR T cells containing an inducible suicide gene. Treatment was safe; the majority of patients experienced mild cytokine release syndrome, and activation of the suicide gene in one patient depleted CAR T cells within 4h. GD2-CAR T cells expanded in vivo, peaking in blood at 2 weeks, and detectable in blood, bone marrow, and even CSF for months after infusion. 11 patients received multiple CAR T doses with similar safety and expansion profiles. 3-year OS was 40%, with complete response in a third of the patients.

Contributed by Alex Najibi

BACKGROUND: Immunotherapy with chimeric antigen receptor (CAR)-expressing T cells that target the disialoganglioside GD2 expressed on tumor cells may be a therapeutic option for patients with high-risk neuroblastoma. METHODS: In an academic, phase 1-2 clinical trial, we enrolled patients (1 to 25 years of age) with relapsed or refractory, high-risk neuroblastoma in order to test autologous, third-generation GD2-CAR T cells expressing the inducible caspase 9 suicide gene (GD2-CART01). RESULTS: A total of 27 children with heavily pretreated neuroblastoma (12 with refractory disease, 14 with relapsed disease, and 1 with a complete response at the end of first-line therapy) were enrolled and received GD2-CART01. No failure to generate GD2-CART01 was observed. Three dose levels were tested (3-, 6-, and 10_10(6) CAR-positive T cells per kilogram of body weight) in the phase 1 portion of the trial, and no dose-limiting toxic effects were recorded; the recommended dose for the phase 2 portion of the trial was 10_10(6) CAR-positive T cells per kilogram. Cytokine release syndrome occurred in 20 of 27 patients (74%) and was mild in 19 of 20 (95%). In 1 patient, the suicide gene was activated, with rapid elimination of GD2-CART01. GD2-targeted CAR T cells expanded in vivo and were detectable in peripheral blood in 26 of 27 patients up to 30 months after infusion (median persistence, 3 months; range, 1 to 30). Seventeen children had a response to the treatment (overall response, 63%); 9 patients had a complete response, and 8 had a partial response. Among the patients who received the recommended dose, the 3-year overall survival and event-free survival were 60% and 36%, respectively. CONCLUSIONS: The use of GD2-CART01 was feasible and safe in treating high-risk neuroblastoma. Treatment-related toxic effects developed, and the activation of the suicide gene controlled side effects. GD2-CART01 may have a sustained antitumor effect. (Funded by the Italian Medicines Agency and others; ClinicalTrials.gov number, NCT03373097.).

Author Info: (1) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.

Author Info: (1) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (2) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (3) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (4) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (5) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (6) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (7) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (8) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (9) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (10) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (11) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (12) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (13) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (14) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (15) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (16) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (17) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (18) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (19) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (20) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (21) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (22) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (23) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (24) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospedale dei Bambini, Azienda Socio Sanitaria Territoriale Spedali Civili Brescia, Brescia (V.F.), and the Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples (C.Q.) - all in Italy; and INSERM, Centre d'Investigation Clinique 1418 (CIC1418) EpidŽmiologie Clinique, Paris (R.A.). (25) From the Department of Pediatric Hematology and Oncology and of Cell and Gene Therapy (F.D.B., B.D.A., I.C., G.D.B., M.A.D.I., A.S., A.M., M.G.C., D.P., M. Amicucci, G.L.P., V.B., M.S., S.D.C., M. Guercio, Z.A., L.I., M. Algeri, P.M., F.G., C.Q., F.L.), the Transfusion Unit, Department of Laboratories (G.L.), Officina Farmaceutica, Good Manufacturing Practice Facility (M. Gunetti, S.I., R.B., S.M.), and the Nuclear Medicine Unit (M.C.G., M.F.V.), Department of Imaging (G.S.C.), IRCCS Ospedale Pediatrico Bambino Ges, and the Department of Life Sciences and Public Health, Catholic University of the Sacred Heart (F.L.), Rome, the Pediatric Hematology and Oncology Unit, IRCCS Policlinico San Matteo, Pavia (F.B.), the Pediatric Hematology-Oncology Unit, Institute for Maternal and Child Health, IRCCS "Burlo Garofolo," Trieste (M.R.), Pediatric Oncology Hematology, Mother and Child Health Department, Santa Maria della Misericordia Hospital, Perugia (K.P.), the Pediatric Hematology-Oncology Unit, Ospeda