1. Clinic for Orthopaedics and Traumatology, Albert Ludwigs University of Freiburg, Freiburg im Breisgau, Germany
2. Clinic for Anesthesiology and Intensive Care Medicine, University Hospital Leipzig, Leipzig, Germany
3. Department of Traumatology and Reconstructive Surgery, BG Trauma Center Tübingen, Eberhard Karls University Tübingen, Tübingen, Germany
4. Clinic for orthopedics and traumatology, Clinic Heidenheim, Heidenheim, Germany