Avi Ohry1,2, Waghi S El Masri3,4,5. 1. 1Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. 2. Reuth Rehabilitation and Medical Center, Tel Aviv, Israel. 3. 3Keele University, Keele, Newcastle UK. 4. Hunters Moor Neurorehabilitation Centre, Birmingham, UK. 5. 5The Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Gobowen UK.