1. Vascular Centre Arnsberg, Arnsberg Clinic, Arnsberg, Germany
2. Department of Surgery, Northwest Clinics, Alkmaar, the Netherlands
3. Peripheral Interventional Unit, Humanitas Gavazzeni, Bergamo, Italy
4. Department of Radiology, St. Antonius Hospital, Nieuwegein, the Netherlands
5. Vascular Service, Department of Surgery, Changi General Hospital, Changi, Singapore