1. Department of General and Visceral Surgery, Campus Benjamin Franklin, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Hindenburgdamm 30, 12203 Berlin, Germany
2. Department of Clinical Quality and Risk Management, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Charitéplatz 1, 10117 Berlin, Germany
3. Department of Biometry and Clinical Epidemiology, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin und Humboldt-Universität zu Berlin, Charitéplatz 1, 10117 Berlin, Germany