1. Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, Department of Surgery, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
2. Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
3. Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, USA
4. Division of Colon and Rectal Surgery, Advocate Lutheran General Hospital, Park Ridge, Illinois, Division of Colon and Rectal Surgery, University of Illinois at Chicago, Chicago, Illinois, USA