1. 1st Department of Orthopaedic Surgery, Medical School, Orthopaedic Research and Education Center “P.N.Soukakos”, Biomechanics and Gait Analysis Laboratory “Sylvia Ioannou”, “Attikon” University Hospital, National and Kapodistrian University of Athens, Athens, Greece;
2. Physioloft Physical Therapy Center, Athens, Greece;
3. 2nd Department of Orthopaedic Surgery, Medical School, Konstantopouleio General Hospital, Nea Ionia, National and Kapodistrian University of Athens, Athens, Greece