1Center for Cellular and Molecular Therapeutics, The Children's Hospital of Philadelphia, United States
2Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, United States
3Division of Hematology, The Children's Hospital of Philadelphia, United States
4Division of Oncology and Center for Childhood Cancer Research, The Children's Hospital of Philadelphia, United States
5Department of Pediatrics, Benioff Children's Hospital and the Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, CA, United States
6Department of Hematology, St. Jude Children's Research Hospital, United States