1. Department of Radiation Oncology; University of Michigan; Ann Arbor Michigan
2. Center for Cancer Biostatistics; University of Michigan; Ann Arbor Michigan
3. Department of Internal Medicine; University of Michigan; Ann Arbor Michigan
4. Department of Health Management and Policy; University of Michigan; Ann Arbor Michigan
5. Center for Clinical Management Research, Ann Arbor VA Health Care System; Ann Arbor Michigan
6. Department of Epidemiology; University of Michigan; Ann Arbor Michigan
7. Department of Epidemiology; Emory University; Atlanta Georgia
8. Department of Preventive Medicine; University of Southern California Keck School of Medicine; Los Angeles California
9. Breast Surgical Service, Memorial Sloan Kettering Cancer Center; New York New York