1. Department of Radiology, Sahlgrenska University Hospital, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
2. Department of Surgery, Sahlgrenska University Hospital, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
3. Department of Medicine, Sahlgrenska University Hospital, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
4. Department of Medicine, Skövde Hospital/KSS, Skövde, Sweden
5. Department of Medicine, Southern Älvsborg Hospital, Borås, Sweden
6. Department of Surgery, Kungälv Hospital, Kungälv, Sweden
7. Department of Surgery, Northern Älvsborg Hospital, Trollhättan, Sweden