1. Department of Physical Therapy, Technological Educational Institute (T.E.I.) of Western Greece, Greece
2. Orthopaedic Department, University Hospital of Patras, Greece
3. Department of Physiotherapy, Technological Educational Institute (T.E.I) of Sterea Ellada, Greece
4. Department of Physiotherapy, Technological Educational Institute (T.E.I.) of Athens, Greece
5. Imperial College Healthcare NHS Trust, London, UK
6. University of Manchester, Manchester, UK