1. Section of Colorectal Surgery, New York Medical College, Westchester Medical Center , Valhalla, New York , USA
2. Department of Gastrointestinal Surgery, St Olav’s Hospital, Trondheim University Hospital , Trondheim , Norway
3. Department of Digestive Surgery, Akershus University Hospital , Akershus , Norway
4. Department of Surgery, Yeditepe University Hospital , Istanbul , Turkey
5. Department of Surgery and Translational Medicine, Careggi Hospital, University of Florence , Florence , Italy
6. Division of Colorectal Surgery, Cedar Sinai Medical Center , Los Angeles, California , USA
7. Department of Surgery, Linköping University Hospital , Linköping , Sweden
8. Division of Colon and Rectal Surgery, Harbor-UCLA Medical Center , Torrance, California , USA