1. Department of Pediatrics Aflac Cancer and Blood Disorders Center Children's Healthcare of Atlanta Emory University School of Medicine Atlanta Georgia USA
2. Division of Pediatric Surgery Department of Surgery Yale‐New Haven Children's Hospital Yale University School of Medicine New Haven Connecticut USA
3. Division of Pediatric Surgery Department of Surgery Nationwide Children's Hospital The Ohio State University College of Medicine Columbus Ohio USA
4. Division of Cancer Epidemiology and Genetics National Cancer Institute National Institutes of Health Rockville Maryland USA
5. Division of Oncology Department of Pediatrics Children's Hospital of Philadelphia/University of Pennsylvania Philadelphia Pennsylvania USA
6. The University of Texas MD Anderson Cancer Center Houston Texas USA
7. Section of Pediatric Dermatology Department of Pediatrics Children's Hospital of Philadelphia Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
8. Division of Pediatric Oncology Department of Oncology Johns Hopkins University School of Medicine Baltimore Maryland USA
9. Department of Dermatology University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA
10. Department of Medicine University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA
11. St. Jude Children's Research Hospital Memphis Memphis Tennessee USA
12. Department of Pediatrics University of Pittsburgh School of Medicine Pittsburgh Pennsylvania USA