1. Department of Surgery, Amphia Hospital, Breda, The Netherlands
2. Department of Medical Psychology, Tilburg University & St. Elisabeth Hospital, Tilburg, The Netherlands
3. Department of Vascular Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands
4. Department of Angiology and Vascular Surgery, Hospital de Santa Marta, Lisbon, Portugal
5. Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands