Affiliation: | (1) Winford Unit, Avon Orthopaedic Centre, Southmead Hospital, Bristol, UK;(2) Department of Orthopaedic Surgery, University of Bristol, Bristol Royal Infirmary, Bristol, UK;(3) Department of Mechanical Engineering, Centre for Orthopaedic Biomechanics, University of Bath, Bath, BA2 7AY, UK |