1 Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden; Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden. Electronic address: anders.wanhainen@uu.se.
2 Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden; Department of Surgery, Gävle County Hospital, Gävle, Sweden; Centre for Research and Development, Uppsala University, Region Gävleborg, Gävle, Sweden.
3 Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden.
4 Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden.
5 Department of Surgical Sciences, Vascular Surgery, Uppsala University, Uppsala, Sweden; Centre for Clinical Research, Uppsala University, Region Dalarna, Falun, Sweden; Department of Surgery, Falun County Hospital, Falun, Sweden.