1. Department of Surgery and Perioperative Science, Surgery, University of Umeå and Östersund Hospital, Östersund, Sweden
2. Hospital of Östersund, Östersund, Sweden
3. Department of Public Health and Clinical Medicine, Östersund, Umeå University, Umeå, Sweden
4. Department of Research and Development, Hospital of Östersund, Östersund, Sweden
5. Department of Clinical Science, Obstetrics and Gynaecology, Umeå University, Umeå, Sweden