1. Department of Trauma and Reparative Medicine, CLINTEC, Karolinska Institute, Karolinska University Hospital, Sweden
2. Department of Clinical Science and Education Södersjukhuset, Karolinska Institute, Sweden
3. Department of Surgery, Södersjukhuset, Sweden
4. Department of Surgical and Perioperative Science, Division of Surgery, Umeå University, Sweden
5. Department of Surgery, CLINTEC, Karolinska Institute, Enköping Hospital, Sweden