1. Department of Surgery, Colorectal Unit, Örebro University Hospital, Örebro, Sweden;
2. School of Rudbeck, Örebro, Sweden;
3. Department of Cardiothoracic and Vascular Surgery, Örebro University Hospital, Örebro, Sweden;
4. Department of Vascular Surgery, Institute of Medicine, Gothenburg, Sweden;
5. Department of Molecular and Clinical Medicine, Sahlgrenska University Hospital and Academy, Gothenburg, Sweden