1. Division of Trauma, Hand and Elbow Surgery, Cologne University Medical Centre, Cologne, Germany
2. Rostock University Medical Centre, Department of Orthopaedics, Rostock, Germany
3. orthoGroup, Hamburg, Germany
4. Shoulder and Elbow Surgery, Schulthess Klinik, Zurich, Switzerland
5. Department of Trauma and Hand Surgery, ViDia Christliche Kliniken Karlsruhe, St. Vincentius-Kliniken, Karlsruhe, Germany
6. SRH Hochschule für Gesundheit, Campus Stuttgart, Germany
7. Department of Sports Orthopaedics, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
8. Joint Surgery, HELIOS ENDO-Klinik Hamburg, Hamburg, Germany
9. Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
10. Mediapark Klinik, Cologne, Germany
11. Department of Orthopaedics and Trauma Surgery, Witten/Herdecke University, Campus Cologne-Merheim, Cologne, Germany