1. Section of Vascular Investigations; Division of Cardiovascular and Pulmonary Diseases; Department of Vascular Surgery; Oslo University Hospital; Oslo Norway
2. Faculty of Medicine; Institute of Clinical Medicine; University of Oslo; Oslo Norway
3. Otivio AS; Gaustadalléen 21 Oslo 0349 Norway
4. Department of Anesthesiology; Oslo University Hospital; Oslo Norway
5. Department of Vascular Surgery; Oslo University Hospital; Oslo Norway
6. Oslo Center for Biostatistics and Epidemiology; Research Support Services; Oslo University Hospital; Oslo Norway