1. American College of Surgeons, Chicago, Illinois.
2. Department of Surgery, Loyola University Medical Center, Maywood, Illinois.
3. University of Texas Southwestern, Dallas, Texas.
4. Moffitt Cancer Center, Tampa, Florida.
5. University of Louisville, Louisville, Kentucky.
6. University of Minnesota, Minneapolis, Minnesota.
7. Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
8. Department of Surgery, Boston Veterans Affairs Health Care System, Boston University, Boston, Massachusetts.
9. Department of Surgery, University of Washington, Seattle, Washington.
10. Department of Surgery, University of California Los Angeles, Los Angeles, California.
11. Department of Surgery, John Peter Smith Health Network, Fort Worth, Texas.