1. Department of Hematology Oeffinger Aarhus University Hospital Aarhus Denmark
2. Department of Medicine Duke Cancer Institute Durham North Carolina USA
3. Unit of Statistics and Data Analysis Danish Cancer Society Research Center Copenhagen Denmark
4. Departments of Oncology and Epidemiology and Cancer Control St Jude Children's Research Hospital Memphis Tennessee USA
5. Public Health Sciences Division Fred Hutchinson Cancer Research Center Seattle Washington USA
6. Department of Radiation Oncology Stanford University Stanford California USA
7. Department of Pediatrics Aarhus University Hospital Aarhus Denmark
8. Childhood Cancer Research Group Danish Cancer Society Research Center Copenhagen Denmark
9. Department of Clinical Medicine Aarhus University Hospital Aarhus Denmark
10. Department of Epidemiology and Cancer Control St Jude Children's Research Hospital Memphis Tennessee USA