1. Oxford Brookes University; Department of Sport and Health Sciences; Jack Straws Lane Oxford Oxon UK OX3 0FL
2. University of Oxford; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS); Windmill road Oxford UK OX3 7LD
3. University of Warwick; Warwick Clinical Trials Unit; Gibbet Hill Rd Coventry UK CV4 7AL
4. University of Ottawa; School of Rehabilitation Sciences, Faculty of Health Sciences; 451 Smyth Road Ottawa ON Canada K1H 8M5