1 Section of Vascular Surgery, Department of Surgery, Trondheim University Hospital, St Olavs Hospital, Trondheim, Norway; Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway; Norwegian Registry for Vascular Surgery (NORKAR), Department of Medical Quality Registries, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway. Electronic address: martin.altreuther@stolav.no.
2 Section of Vascular Surgery, Department of Surgery, Trondheim University Hospital, St Olavs Hospital, Trondheim, Norway; Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway.
3 Norwegian Registry for Vascular Surgery (NORKAR), Department of Medical Quality Registries, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.