1. Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University of Duisburg-Essen, Germany
2. Department of Angiology, University Hospital Zurich, Switzerland
3. Department of Vascular and Endovascular Surgery, Asklepios Clinic Wandsbek, Asklepios Medical School, Hamburg, Germany
4. Division of Angiology, Medical University Graz, Austria
5. Department of Clinical and Experimental Medicine, University of Surrey, Guildford, UK
6. Vascular Department, Surrey and Sussex Healthcare NHS Trust, East Surrey Hospital, Redhill, UK
7. Department of Cardiology III - Angiologie, Center of Cardiology, University Medical Center of the Johannes Gutenberg University Mainz, Germany
8. GRN Hospital Weinheim, Cardiology and Vascular Medicine, Weinheim, Germany
9. Department of Internal Medicine III, University Hospital Schleswig-Holstein, University of Kiel, Germany