1. Department of Surgery, Lillebaelt Hospital, Skovvangen 2-8, Kolding, 6000, Denmark
2. Department of Abdominal Surgery, University Hospitals Leuven, Leuven, Belgium
3. Royal Infirmary of Edinburgh, Edinburgh, UK
4. Department of Surgery, Skåne University Hospital, University of Lund, Malmö, Sweden
5. Department of Surgery, College of Medicine, University of the Philippines Manila, Manila, Philippines
6. Department of Surgery, School of Medicine, University of South Carolina, Greenville, SC, USA
7. Department of Surgery, Center for Surgical Science, Zealand University Hospital, Køge, Denmark
8. Gastrounit, Surgical Section, Hvidovre Hospital, Hvidovre, Denmark