Leukemia, Lymphoid

• Department of Pediatric Hematology-Oncology, Italian Hospital — Buenos Aires, Argentina
• Children's Cancer Research Institute, St Anna Kinderspital — Vienna, Austria
• Department of Pediatric Hemato-Oncology, Gent University Hospital — Ghent, Belgium
• Department of Pediatrics Hematology and Oncology, Hospital Roberto del Rio — Santiago, Chile

• University of California, San Diego — San Diego, California, United States
• Atlanta Cancer Care — Roswell, Georgia, United States
• Center for Cancer & Blood Disorders — Bethesda, Maryland, United States
• MD Anderson Cancer Center — Houston, Texas, United States

Not specified

• National Heart, Lung and Blood Institute (NHLBI) — Bethesda, Maryland, United States

• Fairview University Medical Center — Minneapolis, Minnesota, United States

• University Hospitals Cleveland Medical Center, Rainbow Babies & Children's Hospital, Case Comprehensive Cancer Center — Cleveland, Ohio, United States