1 Geo-Health Laboratory, University of Canterbury, Christchurch, New Zealand; Department of Radiology, Christchurch Public Hospital, Canterbury District Health Board, Christchurch, New Zealand; Christchurch Vascular Group, Christchurch, New Zealand.
2 Christchurch Vascular Group, Christchurch, New Zealand; Department of Surgery, University of Otago, Christchurch, New Zealand; Department of Vascular, Endovascular & Transplant Surgery, Christchurch Public Hospital, Christchurch, New Zealand. Electronic address: [email protected].