1. Department of Surgical SciencesUppsala UniversityUppsalaSweden
2. Department of Surgery, Centre for Clinical ResearchVästmanland Regional HospitalVästeråsSweden
3. Department of Surgical and Perioperative Sciences, Sunderby Research UnitUmeå University Umeå Sweden
4. Department of SurgeryUppsala University HospitalUppsalaSweden
5. Department of Clinical Science and Education SödersjukhusetKarolinska Institutet Stockholm Sweden
6. Department of SurgerySödersjukhuset Stockholm Sweden