The collaborative network of the Cellular Therapy Committee of the Children’s Oncology Group. Abbreviations: ALL – Acute lymphoblastic leukemia, AML – Acute myelogenous leukemia, NB – neuroblastoma, CNS – Central nervous system, CCL – Cancer Control, AYA – Adolescent and young adult, PTCTC – Pediatric Transplant and Cellular Therapy Consortium, BMT CTN – Bone marrow transplant clinical trials network.