1. Department of Colorectal Surgery, Beaujon Hospital, Assistance Publique-Hôpitaux de Paris, Université Paris VII, Clichy, France
2. Department of Surgery, Academic Medical Center, Amsterdam, the Netherlands
3. Department of Abdominal Surgery, University Hospitals Leuven, Leuven, Belgium
4. Department of Surgery, Luigi Sacco University Hospital, Milan, Italy
5. Department of Colorectal Surgery, St. Mark’s Hospital, Harrow, UK
6. Department of Colorectal Surgery, Humanitas Research Hospital, Milan, Italy