Acute Leukemia of Ambiguous Lineage

• University Hospitals Birmingham NHS Foundation Trust — Birmingham, England, United Kingdom
• Leeds Teaching Hospital NHS Trust — Leeds, England, United Kingdom
• University College London Hospitals NHS Trust — London, England, United Kingdom
• Kings College NHS Foundation Trust — London, England, United Kingdom

• Fred Hutch/University of Washington Cancer Consortium — Seattle, Washington, United States

Not specified

• Children's Hospital of Los Angeles — Los Angeles, California, United States
• Children's Healthcare of Atlanta — Atlanta, Georgia, United States
• University of Iowa/Holden Comprehensive Cancer Center — Iowa City, Iowa, United States
• Dana Farber / Boston Children's Hospital — Boston, Massachusetts, United States

• Banner MD Anderson Cancer Center — Gilbert, Arizona, United States
• UCLA Ronald Reagan Medical Center — Los Angeles, California, United States
• Mayo Clinic — Jacksonville, Florida, United States
• Robert H. Lurie Comprehensive Cancer Center of Northwestern University — Chicago, Illinois, United States

• University of Pittsburgh Cancer Institute (UPCI) — Pittsburgh, Pennsylvania, United States
• Fred Hutch/University of Washington Cancer Consortium — Seattle, Washington, United States

• Children's Hospital of Alabama — Birmingham, Alabama, United States
• USA Health Strada Patient Care Center — Mobile, Alabama, United States
• Providence Alaska Medical Center — Anchorage, Alaska, United States
• Banner Children's at Desert — Mesa, Arizona, United States

• M D Anderson Cancer Center — Houston, Texas, United States

• Fred Hutch/University of Washington Cancer Consortium — Seattle, Washington, United States

• Fred Hutch/University of Washington Cancer Consortium — Seattle, Washington, United States