1. Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
2. Department of Pediatrics, Maine Medical Center, Portland, Maine, USA.
3. Department of Individualized Cancer Management, Moffitt Cancer Center, Tampa, Florida, USA.
4. Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, USA.
5. Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, Minnesota, USA.
6. Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts, USA.
7. Department of Medicine, Oregon Health & Science University, Portland, Oregon, USA.
8. Department of Radiation Oncology, Winship Cancer Institute of Emory University, Atlanta, Georgia, USA.
9. Department of Pediatrics, Seattle Children's Hospital, Seattle, Washington, USA.
10. Department of Radiation Oncology, University of Florida, Jacksonville, Florida, USA.
11. Department of Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA.
12. Department of Orthopaedic Surgery, UC Davis Health, Sacramento, California, USA.
13. Sarcoma Alliance for Research through Collaboration, Ann Arbor, Michigan, USA.
14. Department of Medicine, Duke Cancer Institute, Durham, North Carolina, USA.
15. Department of Orthopaedic Surgery, Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
16. Department of Radiation Oncology, Rush University Medical Center, Chicago, Illinois, USA.
17. Department of Pediatrics, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
18. Department of Epidemiology and Biostatistics, University of Arizona, Tucson, Arizona, USA.