1. Massachusetts General Hospital Cancer Center; Boston MA USA
2. Continuum Cancer Centers of New York; New York NY USA
3. Albert Einstein School of Medicine; New York NY USA
4. Harvard Medical School; Boston MA USA
5. Dana-Farber Cancer Institute; Boston MA USA
6. Department of Radiation Oncology; University of North Carolina at Chapel Hill; Chapel Hill NC USA
7. Center for Health Quality, Outcomes, and Economic Research; Edith Nourse Rogers Memorial Veterans Hospital; Bedford MA USA
8. Boston University School of Public Health; Boston MA USA
9. Beth Israel-Deaconess Medical Center; Boston MA USA
10. Brigham and Women's Hospital; Boston MA USA
11. Department of Radiation Oncology; Massachusetts General Hospital; Boston MA USA