1. Department of Joint Replacement, General and Rheumatic Orthopaedics, Orthopaedic Clinic Markgröningen gGmbH, Kurt-Lindemann-Weg 10, 71706 Markgröningen, Germany
2. Orthopaedic Department, University-Hospital Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
3. Orthopaedic Department, Klinikum Saarbrücken, Winterberg 1, 66119 Saarbrücken, Germany
4. PremiQaMed Privatkliniken GmbH Heiligenstädter Straße 55-63, 1190 Wien, Austria