1. On behalf of the Belgian Section of Colorectal Surgery, a section of the Royal Belgian Society for Surgery.
2. Department of Digestive Surgery, Academic Hospital, Vrije Universiteit van Brussel, Brussels.
3. Hospital Erasme, Université Libre de Bruxelles, Brussels; Department of Abdominal Surgery, Academic Hospital, Vrije Universiteit van Brussel, Brussels.
4. University Clinic Gasthuisberg, Leuven; Department of Digestive Surgery, Academic Hospital, Vrije Universiteit van Brussel, Brussels.