1. Section of Sports Medicine, Department of Orthopedic and Trauma Surgery, Klinikum Bamberg, Bamberg, Germany.
2. Department of Trauma Surgery, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.
3. Department of Emergency Medicine, University of Colorado School of Medicine, Denver, Colorado, USA.
4. Department of Sports Orthopedics, Technical University of Munich, Munich, Germany.
5. Department of Orthopedic Surgery, Kantonsspital St Gallen, St Gallen, Switzerland.
6. Institute of Occupational and Social Medicine, RWTH Aachen University, Aachen, Germany.
7. Department of Pediatrics, Klinikum Bamberg, Bamberg, Germany.
8. Private Clinic, Innsbruck, Austria.
9. OrthoPlus, Munich, Germany.