1. Colchester Hospital, East Suffolk and North Essex NHS Foundation Trust, Colchester, UK
2. Department of Medical and Surgical Sciences, University of Catanzaro, Catanzaro, Italy
3. General Surgery Department, Colorectal Surgery Unit, La Paz University Hospital, Madrid, Spain
4. Department of Surgery and Colorectal Surgery, Academic Hospital Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
5. Department of Surgery, Division of Visceral Surgery, Lausanne University Hospital, Lausanne, Switzerland