1. Clinic for Surgery, Department of Orthopedics and Trauma Surgery, Buetzow, Germany
2. Department of Internal Medicine, University Medical School Rostock, Rostock, Germany
3. Institute of Anatomy, University Medical School Rostock, Rostock, Germany
4. Institute for Biomedical Engineering, University of Rostock, Rostock-Warnemuende, Germany
5. Faculty of Medicine Carl Gustav Carus, Dresden, Germany
6. Institute of Diagnostic and Interventional Radiology/Neuroradiology, Westkuestenklinikum Heide, Academic Teaching Hospital of the Universities of Kiel, Luebeck and Hamburg, Heide, Germany
7. Department of Internal Medicine IV, Municipal Hospital Suedstadt Rostock, Academic Teaching Hospital of the University of Rostock, Rostock, Germany