1. Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research CentreUniversity of Oxford Oxford OX3 7LD United Kingdom
2. Department of Mechanical Engineering, Centre for Orthopaedic BiomechanicsUniversity of Bath Bath United Kingdom
3. Leeds Institute of Rheumatic and Musculoskeletal MedicineUniversity of Leeds Leeds United Kingdom