1. Catharina Hospital; Department of Vascular Surgery; Michelangelolaan 2 Eindhoven Netherlands 5623 EJ
2. MUMC; CAPRHI School for Public Health and Primary Care; Maastricht Netherlands
3. Erasmus MC; Departments of Epidemiology & Radiology; Dr Molewaterplein 40 PO Box 2040 Rotterdam Netherlands 3015 GD