1. Washington University, St Louis, Missouri
2. NRG Oncology Statistics and Data Management Center, Philadelphia, Pennsylvania
3. University of California Davis School of Medicine, Sacramento
4. Imaging and Radiation Oncology Core Group, St Louis, Missouri
5. Emory University, Atlanta, Georgia
6. Centre Hospitalier de l’Université de Montréal–Notre Dame, Montreal, Quebec, Canada
7. Tom Baker Cancer Centre, Calgary, Alberta, Canada
8. McGill University, Montreal, Quebec, Canada
9. Cross Cancer Institute, Edmonton, Alberta, Canada
10. Toronto-Sunnybrook Regional Cancer Centre, Toronto, Ontario, Canada
11. University of Michigan Medical Center, Ann Arbor
12. now with William Beaumont Oakland University Medical School, Dearborn, Michigan
13. Akron City Hospital, Akron, Ohio
14. London Regional Cancer Program, London, Ontario, Canada
15. McMaster University, Juravinski Cancer Center, Hamilton, Ontario, Canada
16. L’Hotel-Dieu de Quebec, Quebec City, Quebec, Canada
17. Cedars-Sinai Medical Center, Los Angeles, California