1. Department of Orthopedic Surgery Helios ENDO-Klinik Hamburg Hamburg Germany
2. Department of Orthopedic and Traumatology Ankara University Faculty of Medicine Ankara Turkey
3. Klinik und Poliklinik für Unfallchirurgie und Orthopädie, Universitätsklinikum Hamburg‐ Eppendorf Hamburg Germany
4. Department of Orthopedic and Traumatology Southland Hospital Invercargill New Zealand