1. University Outpatient Clinic; Department Sports Medicine; University of Potsdam; Potsdam Germany
2. Applied Research and Development Physiotherapy; Health Section; Bern University of Applied Sciences; Bern Switzerland
3. Department of Orthopaedics and Traumatology; Albert-Ludwigs University Freiburg; Freiburg Germany
4. Institute of Health Sciences; University of Education Schwäbisch Gmünd; Schwäbisch Gmünd Germany