Institution: | 1. Department of General, Visceral and Vascular Surgery, University of Halle-Wittenberg, Ernst-Grube-Strasse 40, 06097, Halle (Saale), Germany 2. Department of General Surgery, University of Vienna, W?hringer Gürtel 18-20, 1090, Vienna, Austria 3. Department of General-, and Visceral Surgery, DRK-Clinics Westend, Spandauer Damm 130, 14050, Berlin, Germany
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