1. Section of Vascular Investigations; Oslo University Hospital, Aker; Oslo Norway
2. Bjorknes College; Oslo Norway
3. Department of Medicine; Diakonhjemmet Hospital; Oslo Norway
4. Oslo Sports Trauma Research Center; Department of Sports Medicine; Norwegian School of Sports Sciences; Oslo Norway
5. Department of Cardiology; Oslo University Hospital, Aker; Oslo Norway
6. Department of Cardiology; Akershus University Hospital; Lorenskog Norway