1. Division of Pediatric Hematology-Oncology, Charles-Bruneau Cancer Center, Centre Hospitalier Universitaire Sainte-Justine Research Center, Montréal, QC, Canada;
2. Helen Diller Family Cancer Research Center, Department of Pediatrics, Benioff Children’s Hospital, University of California, San Francisco, San Francisco, CA;
3. Department of Pathology, Boston Children’s Hospital, Boston, MA;
4. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA;
5. Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, OH;
6. Department of Pediatrics, University of Rochester School of Medicine and Wilmot Cancer Institute, Rochester, NY;
7. Division of Hematology/Oncology, McMaster Children's Hospital, Hamilton Health Sciences, Hamilton, ON, Canada;
8. San Jorge Children's Hospital, San Juan, Puerto Rico;
9. Department of Pediatrics, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY;
10. Division of Pediatric Hematology/Oncology/Stem Cell Transplantation, Columbia University Medical Center, New York, NY;
11. Département de Pédiatrie, Centre Mère-Enfant Soleil, Centre Hospitalier Universitaire de l’Université Laval, Québec City, QC, Canada;
12. Inova Fairfax Hospital for Children, Falls Church, VA;
13. Division of Pediatric Hematology/Oncology, Hasbro Children's Hospital/Brown University, Providence, RI; and
14. Department of Pediatric Oncology, Dana-Farber Cancer Institute and Boston Children's Hospital, Boston, MA