1. Section of Colorectal Surgery, Department of Surgery, Westchester Medical Center, New York Medical College, Valhalla, NY
2. Division of Colon and Rectal Surgery, State University of New York, Stony Brook, NY
3. Division of Colon and Rectal Surgery, Louisiana State University, New Orleans, LA
4. Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, IL