1. Department of Surgery, Faculty of Medicine and Health, Örebro University, Örebro, Sweden;
2. Faculty of Medicine and Health, University Health Care Research Center, Örebro University, Örebro, Sweden;
3. Department of Oncology, Örebro University Hospital, Örebro, Sweden;
4. Department of Oncology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden;
5. Regional Oncological Centre Uppsala-Örebro, Uppsala, Sweden