1. Department of Internal Medicine; Brigham and Women's Hospital; Boston Massachusetts
2. Harvard Medical School; Boston Massachusetts
3. Department of Radiation Oncology; Dana-Farber Cancer Institute and Brigham and Women's Hospital; Boston Massachusetts
4. Department of Radiation Oncology; Massachusetts General Hospital; Boston Massachusetts
5. Department of Radiation Oncology; The University of Texas MD Anderson Cancer Center; Houston Texas
6. Department of Therapeutic Radiology/Radiation Oncology; Yale School of Medicine; New Haven Connecticut
7. Department of Radiation Oncology; University of Michigan Health System; Ann Arbor Michigan