1. Department of Sport Science, Rheinland-Pfälzische Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
2. Clinic for Diagnostic and Interventional Radiology, Saarland University Medical Center Homburg, 66421 Homburg, Germany
3. Chirurgisch-Orthopädisches Zentrum Illingen, 66557 Illingen, Germany