1. Center for Transplantation Sciences, Massachusetts General Hospital, Boston, MA 02114, USA.
2. Division of Hematology/Oncology, Boston Children’s Hospital, Boston, MA 02115, USA.
3. Department of Pediatric Oncology, Dana Farber Cancer Institute, Boston, MA 02115, USA.
4. Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
5. Division of Hematology/Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
6. Immunology Graduate Group and Veterinary Medical Scientist Training Program, University of Pennsylvania, Philadelphia, PA 19104, USA.
7. Graduate Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI 48109, USA.
8. Clinical Research Division, Fred Hutchinson Cancer Research Center, University of Washington, Seattle, WA 98109, USA.
9. Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, University of Washington, Seattle, WA 98101, USA.
10. École Polytechnique Féderalé de Lausanne (EPFL), 1015 Lausanne, Switzerland.
11. Medical Research Center, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland.
12. Department of Laboratory Medicine and Pathology, Center for Immunology, Masonic Cancer Center, University of Minnesota School of Medicine, Minneapolis, MN 55455, USA.
13. Division of Blood and Marrow Transplant and Cellular Therapy, Department of Pediatrics, University of Minnesota School of Medicine, Minneapolis, MN 55455, USA.
14. Regeneron Pharmaceuticals Inc., Tarrytown, NY 10591, USA.