1. Deparment of Trauma and Orthopedic Surgery, University of Witten/Herdecke, Cologne Merheim Medical Center, Cologne, Germany
2. Department of Training and Movement Science, University of Freiburg, Freiburg, Germany
3. Department of Orthopedics and Traumatology, Paracelsus Private Medical University Nuremberg, Nuremberg
4. Sports Clinic Cologne at Cologne Merheim Medical Center, Cologne, University of Witten/Herdecke, Cologne, Germany
5. Department of Trauma and Reconstructive Surgery with Division of Knee and Shoulder Surgery, Sports Traumatology, Asklepios Clinic St. Georg, Hamburg, Germany