1. Division of Hematology and Oncology, Sainte-Justine Hospital, University of Montreal, Montreal, QC, Canada;
2. Departments of Pediatric Oncology, Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA;
3. Division of Pediatric Hematology/Oncology, University of Rochester Medical Center, Rochester, NY;
4. Division of Pediatric Hematology/Oncology, McMaster University, Hamilton, ON, Canada;
5. Division of Pediatric Oncology, San Jorge Children's Hospital, San Juan, Puerto Rico;
6. Department of Pediatric Hematology/Oncology, Maine Children's Cancer Program, Scarborough, ME;
7. Centre Hospitalier Universitaire de Quebec, Quebec City, QC, Canada;
8. Section of Pediatric Hematology Oncology, Tulane Hospital for Children, New Orleans, LA;
9. Department of Pediatrics, Leonard M. Miller School of Medicine, University of Miami, Holtz Children's Hospital of the University of Miami-Jackson Memorial Medical Center; Batchelor Children's Research Institute, Mailman Institute for Child Development, and the Sylvester Comprehensive Cancer Center, Miami, FL;
10. Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA;
11. Division of Hematology/Oncology, Children's Hospital, Boston, MA