1. Joint Center for Radiation Therapy, Beth Israel Hospital, Harvard Medical School, Boston, Massachusetts.
2. Johns Hopkins Oncology Center, Radiation Oncology Division, Baltimore, Maryland.
3. Department of Pathology, Beth Israel Hospital, Harvard Medical School, Boston, Massachusetts.
4. Department of Surgery, Beth Israel Hospital, Harvard Medical School, Boston, Massachusetts.
5. Department of Surgery, Brigham and Women's Hospital, Harvard Medical School Boston, Massachusetts.
6. Revlon Breast Center, Department of Surgery, UCLA Medical School, Los Angeles, California.
7. Departments of Biostatistics and Epidemiology, Dana Farber Cancer Institute and Harvard School of Public Health, Boston, Massachusetts.