Leukemia, Lymphoid

• Hospital Regional de Alta Especialidad de Ixtapaluca — Ixtapaluca, State of Mexico, Mexico
• Hospital General de México "Dr. Eduardo Liceaga" — Mexico City, Mexico

• Hackensack University Medical Center — Hackensack, New Jersey, United States
• Fred Hutchinson Cancer Research Center — Seattle, Washington, United States

• Grupo Cooperativo de Hemopatías Malignas — Huixquilucan, State of Mexico, Mexico

• University of Alabama at Birmingham Cancer Center — Birmingham, Alabama, United States
• Children's Hospital of Orange County — Orange, California, United States
• Lucile Packard Children's Hospital Stanford University — Palo Alto, California, United States
• Children's National Medical Center — Washington D.C., District of Columbia, United States

• Great Ormond Street Hospital for Children NHS Foundation Trust — London, United Kingdom
• University College London Hospitals NHS Foundation Trust — London, United Kingdom
• Royal Manchester Children's Hospital — Manchester, United Kingdom

Not specified

• Boston children hospital — Boston, Massachusetts, United States

• Hospital Regional de Alta Especialidad de Ixtapaluca — Ixtapaluca, State of Mexico, Mexico
• Hospital General de México "Dr. Eduardo Liceaga" — Mexico City, Mexico

• Aalborg Hospital — Aalborg, Denmark
• Department of Pediatrics, Skejby Hospital — Aarhus, Denmark
• Department of Pediatrics, Rigshospitalet — Copenhagen, Denmark
• University Hospital in Odense — Odense, Denmark

• Soon Chun Hyang University Hospital Bucheon — Bucheon-si, South Korea
• Inje University Busan Paik Hospital — Busan, South Korea
• Pusan National University Hospital — Busan, South Korea
• Keimyung University Dongsan Medical Center — Daegu, South Korea