Ewing's Sarcoma

• Phoenix Childrens Hospital — Phoenix, Arizona, United States
• Columbia University Medical Center — New York, United States
• The Hospital for Sick Children — Toronto, Ontario, Canada
• Institute for Pediatric Hematology - Oncology, Leon Berard Cancer Center — Lyon, France

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States

• University Hopital Essen, Pediatrics III, Hematology/ Oncology, Sarcoma Centre, International Ewing Sarcoma Study Group, West German Cancer Centre — Essen, Germany
• University Children´s Hospital, Pediatric Hematology and Oncology — Münster, Germany

• Hospital Clínic de Barcelona — Barcelona, Spain
• Hospital de la Santa Creu i Sant Pau — Barcelona, Spain
• Hospital Vall d'Hebron — Barcelona, Spain
• Hospital Sant Joan de Déu — Esplugues de Llobregat, Spain

• National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States
• Cleveland Clinic Foundation Childrens Hospital — Cleveland, Ohio, United States

• Massachusetts General Hospital — Boston, Massachusetts, United States
• Brigham and Women's Hospital — Boston, Massachusetts, United States
• Dana-Farber Cancer Institute — Boston, Massachusetts, United States

Not specified

• Cincinnati Children's Hospital Medical Center — Cincinnati, Ohio, United States
• Texas Children's Hospital — Houston, Texas, United States

• St. Jude Children's Research Hospital — Memphis, Tennessee, United States