1. Department of Orthopaedic Surgery, Koenig-Ludwig-Haus, Center for Musculoskeletal Research, Julius-Maximilians-University Wuerzburg, Wuerzburg, Germany
2. BioChip Laboratory, Center for Medical Biotechnology, University of Duisburg-Essen, Essen, Germany
3. Department of Orthopaedic Surgery, Harvard Medical School, Boston, MA, USA
4. Department of Orthopaedic Trauma, Center for Trauma Research, BG Trauma Center Tuebingen, University of Tuebingen, Tuebingen, Germany
5. Department of Orthopaedics and Traumatology, Agatharied Hospital, Teaching Hospital of the University of Munich, Hausham, Germany