1. Department of Oncology, Region Västra Götaland, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden
2. Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
3. Institute of Clinical Science, Sahlgrenska University Hospital, Göteborg, Sweden