1. Department of Orthopaedics, Rostock University Medical Center, Rostock, Germany;
2. TU Wien Institute of Lightweight Design and Structural Biomechanics, Vienna, Austria;
3. Department of Orthopaedic Surgery, Hannover Medical School, Hannover, Germany;
4. Chair of Mechanics and Robotics, University of Duisburg-Essen, Duisburg, Germany;
5. BG Unfallklinik Murnau Institute for Biomechanics, Murnau am Staffelsee, Germany;
6. TÜV SÜD Industrie Service GmbH, München/Munich, Germany;
7. Orthopädie & Traumatologie/Orthopedics & Traumatology, TÜV SÜD Product Service GmbH, München/Munich, Germany;
8. Faculty Mechanical Engineering and Mechatronics, Deggendorf Institute of Technology, Deggendorf, Germany