1. Department of Pediatric Surgery, Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA
2. Department of Preventive and Societal Medicine, University of Nebraska Medical Center, Omaha, NE
3. Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN
4. Division of Pediatric Urology, University of Connecticut Health Center, Farmington, CT
5. Division of Pediatrics, Children's Cancer Center, University of Texas M. D. Anderson Cancer Center, Houston, TX
6. University of Wales and Llandough Hospital, National Health Service Trust, Penarth, South Glamorgan, United Kingdom
7. Pediatric 5 (Oncology, Hematology, Immunology), Olga Hospital, Klinikum Stuttgart, Germany
8. Department of Pediatrics, Division of Hematology/Oncology, University Hospital of Padova, Padova, Italy
9. Department of Pediatrics, Institut Gustave Roussy, Villejuif, France
10. Department of Biostatistics, Institut Gustave Roussy, Villejuif, France
11. Institute of Child Life and Health, University of Bristol, Bristol, United Kingdom
12. Department of Pediatric Hematology/Oncology, University of Oklahoma Health Science Center, Oklahoma City, OK