1. AO Research Institute Davos Davos Platz Switzerland
2. Department of Orthopedic Sports Medicine Klinikum Rechts der Isar Technical University of Munich Munich Germany
3. Institute for Biomechanics ETH Zürich Zurich Switzerland
4. Department of Rehabilitation Sciences Faculty of Health University of Witten/Herdecke Witten Germany
5. DRV Clinic Königsfeld Center for Medical Rehabilitation Ennepetal Germany
6. Faculty of Medicine Medical Center‐Albert‐Ludwigs‐University of Freiburg Albert‐Ludwigs‐University of Freiburg Freiburg Germany