1. Charité – Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Vascular Surgery, Berlin, Germany
2. Department of Internal Medicine, Bundeswehr-Zentralkrankenhaus, Koblenz, Germany
3. Charité – Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Medical Biometrics and Clinical Epidemiology, Berlin, Germany
4. Department of Vascular Surgery, Medizinische Hochschule Brandenburg Theodor-Fontane – Campus Neuruppin, Neuruppin, Germany