1. Department of Anesthesia and Intensive Care Medicine, University Hospital, Philipps-University of Marburg, Marburg, Germany
2. Department of Anesthesia and Intensive Care Medicine, Clinique Bénigne Joly, Talant, France
3. Department of Anesthesia and Intensive Care Medicine, University Hospital, Johannes Gutenberg University, Mainz, Germany
4. Department of Orthopedics and Rheumatology, University Hospital Marburg, Marburg, Germany
5. Department of Orthopedics and Traumatology, Lahn-Dill-Klinikum Wetzlar, Wetzlar, Germany