Leukemia

• Royal Marsden Hospital — Surrey, London, United Kingdom
• Birmingham Children's Hospital — Birmingham, United Kingdom
• Leeds General Infirmary — Leeds, United Kingdom
• Royal Manchester Children's Hospital — Manchester, United Kingdom

Not specified

• Children's Hospital of Orange County — Orange, California, United States
• Alfred I. duPont Hospital for Children — Wilmington, Delaware, United States
• Children's National Medical Center — Washington D.C., District of Columbia, United States
• Loyola University Medical Center, Cardinal Bernardin Cancer Center — Maywood, Illinois, United States

Not specified

• UAB Comprehensive Cancer Center — Birmingham, Alabama, United States
• Children's Hospital of Orange County — Orange, California, United States
• UCSF Helen Diller Family Comprehensive Cancer Center — San Francisco, California, United States
• Children's Hospital Colorado Center for Cancer and Blood Disorders — Aurora, Colorado, United States

• Mayo Clinic in Florida — Jacksonville, Florida, United States
• Mayo Clinic — Rochester, Minnesota, United States
• M. D. Anderson Cancer Center at University of Texas — Houston, Texas, United States

• Stanford University School of Medicine — Stanford, California, United States

• Connecticut Children's Medical Center — Hartford, Connecticut, United States
• Miami Children's Hospital — Miami, Florida, United States
• Children's Memorial Hospital - Chicago — Chicago, Illinois, United States
• Maine Medical Center Research Institute — Scarborough, Maine, United States

• H. Lee Moffitt Cancer Center & Research Institute — Tampa, Florida, United States

• Indiana University Cancer Center — Indianapolis, Indiana, United States