1. University Hospital Brandenburg an der Havel, Brandenburg Medical University
2. Visceral Vascular Surgery, Minimally Invasive Surgery Alexianer St. Hedwig Hospital
3. Physiotherapy Practice Soeder, Berlin
4. Department of Surgery, Oberhavel Klinik Oranienburg, Oranienburg, Germany
5. Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Brandenburg