1. Department for Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
2. St. Jude Children's Research Hospital, Memphis, Tennessee, United States
3. Tokyo Medical and Dental Univeristy, Bnkyo-ku, Tokyo, Japan
4. St Jude Children's Research Hospital, Memphis, Tennessee, United States
5. The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
6. New York University, New York, New York, United States
7. Maine Children's Cancer Program, Scarborough, United States
8. Duke University Medical Center, Durham, North Carolina, United States
9. Cook Children's Medical Center, Fort Worth, Texas, United States
10. Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children's Research Hospital, Memphis, TN, United States
11. Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States
12. Seattle Children's Hospital, the Ben Town Center for Childhood Cancer Research, University of Washington, Seattle, WA., Seattle, Washington, United States