1. Department of Surgery, Maastricht University Medical Centre, Maastricht, The Netherlands
2. Department of Surgery, Royal Infirmary, Edinburgh, UK
3. Department of Gastrointestinal Surgery, University Hospital Northern Norway, Norway
4. Faculty of Medicine, University of Tromsø, Tromsø, Norway
5. Nutrition and Toxicology Research Institute, Maastricht University, Maastricht, The Netherlands