1. Department of Trauma and Orthopedic Surgery, Experimental Trauma Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany.
2. Department of Oral and Maxillofacial Surgery, University Medical Center Schleswig-Holstein, Kiel, Germany.
3. Department of Trauma and Orthopedic Surgery, Section for Oncological and Rheumatological Orthopedics, University Medical Center Schleswig-Holstein, Kiel, Germany.
4. AO Research Institute Davos, Davos, Switzerland.