1. Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California
2. Alliance Statistics and Data Center, Weill Cornell Medicine/New York–Presbyterian Hospital, New York, New York
3. Alliance Statistics and Data Center, Duke University, Durham, North Carolina
4. Dallas Surgical Group, Dallas, Texas
5. Clinical Research Unit/TRIO-US Network, Jonsson Comprehensive Cancer Center, University of California, Los Angeles
6. Ashikari Breast Center, Dobbs Ferry, New York
7. Department of Surgery, University of North Carolina, Chapel Hill
8. Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
9. Nashville Breast Center, Nashville, Tenessee
10. Morton Plant Hospital, Clearwater, Florida
11. Division of Surgical Oncology, Department of Surgery, University of Texas Southwestern Medical Center, Dallas
12. MacLaren Regional Medical Center, Michigan State University, Flint
13. Department of Breast Surgical Oncology, University of Texas M. D. Anderson Cancer Center, Houston
14. Breast Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York