1. Department of Biomedical Development AO Research Institute Davos Davos Switzerland
2. Department of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen University of Tübingen Tübingen Germany
3. Department of Orthopedics and Reconstructive Surgery Diakonie Klinikum GmbH Jung‐Stilling‐Krankenhaus Siegen Germany