1. Department of Surgery, Section of Colon & Rectal Surgery Washington University School of Medicine St. Louis Missouri USA
2. Division of Surgical Oncology, Winship Cancer Institute Emory University Atlanta Georgia USA
3. Department of Surgery, Division of Colorectal Surgery University of Michigan Ann Arbor Michigan USA
4. Department of Surgery University of Pittsburgh Medical Center, Division of Colon and Rectal Surgery Pittsburgh Pennsylvania USA
5. Department of Surgery, Division of Surgical Oncology The Ohio State University Columbus Ohio USA
6. Section of Colon & Rectal Surgery Vanderbilt University Medical Center, Division of General Surgery Nashville Tennessee USA
7. Department of Surgery, Division of Colon & Rectal Surgery Emory University Atlanta Georgia USA