1. University College London, John
Scales Centre for Biomedical Engineering, Institute
of Orthopaedics and Musculoskeletal Science, Division
of Surgery and Interventional Science, Royal
National Orthopaedic Hospital, Brockley Hill, Stanmore
HA7 4LP, UK.
2. Royal National Orthopaedic Hospital, Brockley
Hill, Stanmore HA7 4LP, UK.