1. Department of Orthopaedics; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Department of Medical Biometry and Epidemiology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
3. Institute of Experimental Musculoskeletal Medicine; University Hospital Münster; Münster Germany
4. Department of Osteology and Biomechanics; University Medical Center Hamburg-Eppendorf; Hamburg Germany
5. Department of Legal Medicine; University Medical Center Hamburg-Eppendorf; Hamburg Germany