1. Department of Clinical Sciences, Surgery, Lund University, Skane University Hospital, Lund, Sweden
2. Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
3. Division of Surgery, Department of Clinical Science, Intervention and Technology Karolinska Institutet (CLINTEC), Centre for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
4. Department of Surgery, Odense University Hospital, Odense, Denmark
5. Department of Radiation Science, Oncology, Umea University, Umea, Sweden