1. Division of Colon and Rectal Surgery, UMass Memorial Medical Center, Worcester, Massachusetts
2. Division of Colon and Rectal Surgery, Department of Surgery, University of Minnesota, Minneapolis, Minnesota
3. Division of Gastrointestinal and General Surgery, Department of Surgery, Oregon Health and Sciences University, Portland, Oregon
4. Colon and Rectal Surgery, M Health Fairview Southdale Hospital, Minneapolis, Minnesota
5. Colon and Rectal Surgery, University of Vermont Medical Center, Burlington, Vermont
6. Department of Surgery, Scripps Clinic Medical Group, La Jolla, California
7. Division of Colon and Rectal Surgery, Department of Surgery, Rutgers University, New Brunswick, New Jersey
8. Department of Surgery Section of Colon and Rectal Surgery, University of Cincinnati, Cincinnati, Ohio