1. Department of Surgery/Gastrosurgical Research and Education, Sahlgrenska University Hospital, Gothenburg, Sweden;
2. Department of Clinical Sciences/Surgery, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden;
3. Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
4. Department of Plastic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden;
5. Department of Physiotherapy, Sahlgrenska University Hospital and Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden