1. Winship Cancer Institute, Emory University, Atlanta, Georgia
2. NRG Oncology Statistics and Data Management Center, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Duke University Medical Center, Durham, North Carolina
4. Medical College of Wisconsin, Milwaukee
5. University of Chicago, Chicago, Illinois
6. Washington University in St Louis, St Louis, Missouri
7. University of Texas Health Science Center at San Antonio, San Antonio
8. WellSpan York Cancer Center, York, Pennsylvania
9. London Regional Cancer Program, London, Ontario, Canada
10. Juravinski Cancer Centre, McMaster University, Hamilton, Ontario, Canada
11. Kaiser Permanente Northern California, Santa Clara
12. Dana-Farber Cancer Institute, Boston, Massachusetts
13. Mayo Clinic, Rochester, Minnesota
14. University of Rochester, Rochester, New York
15. Cedars-Sinai Medical Center, Los Angeles, California
16. Henry Ford Hospital, Detroit, Michigan