1. Department of Surgery; Stanford University School of Medicine; Stanford California
2. Department of Surgery; Emory University; Atlanta Georgia
3. Department of Surgery; Johns Hopkins University School of Medicine; Baltimore Maryland
4. Department of Surgery; Medical College of Wisconsin; Milwaukee Wisconsin
5. Department of Surgery; Ohio State University; Columbus Ohio
6. Department of Surgery; Washington University School of Medicine; St. Louis Missouri
7. Department of Surgery; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin
8. Department of Surgery; University of California San Diego; San Diego California
9. Department of Surgery; University of Texas Southwestern Medical Center; Dallas Texas
10. Department of Surgery; University of California San Francisco; San Francisco California
11. Department of Surgery; Vanderbilt University; Nashville Tennessee
12. Department of Surgery; Wake Forest Baptist Medical Center; Winston Salem North Carolina
13. Department of Surgery; New York University School of Medicine; New York New York