1. Department of Surgery, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
2. University Hospital Heidelberg, Department of Vascular and Endovascular Surgery, Heidelberg, Germany
3. Institute of Occupational and Social Medicine, Centre for Health and Society, Faculty of Medicine, University of Düsseldorf, Düsseldorf, Germany
4. Mannheim Institute of Public Health, Social and Preventive Medicine, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
5. Department of Surgery, Klinikum Frankfurt Höchst, Frankfurt am Main, Germany