1. BG Klinik Tübingen, Department of Traumatology and Reconstructive Surgery, Eberhard Karls University of Tübingen, Tübingen, Germany
2. Diakonie Klinikum Jung-Stilling GmbH, Department of Trauma and Reconstructive Surgery, Siegen, Germany
3. Osteotomie Komitee der Deutschen Knie Gesellschaft (DKG), Munich, Germany
4. AO Research Institute Davos, Davos, Switzerland