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 Cardiovascular Research Ninewells Hospital and Medical School, UK.
5 University Heart and Vascular Center, Department of Angiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
6 Division of Angiology, Medical University Graz, Austria.
7 Department of Angiology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany.
8 Department of Clinical and Experimental Medicine, University of Surrey, Guildford, UK and Vascular Department, Surrey and Sussex Healthcare NHS Trust, East Surrey Hospital, Redhill, UK.
9 GRN Hospital Weinheim, Cardiology and Vascular Medicine, Weinheim, Germany.
10 Division of Angiology, Department of Medicine II, Medical University of Vienna, Vienna, Austria.
11 Department of Internal Medicine V, University Hospital Schleswig-Holstein, University of Kiel, Germany.