1 Institute for Musculoskeletal Health, University of Sydney and Sydney Local Health District, Sydney, NSW 2050, Australia. Electronic address: gustavo.machado@sydney.edu.au.
2 Oxford Trauma and Emergency Care, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK; Emergency Medicine Research in Oxford, Oxford University Hospitals NHS Foundation Trust, Oxford, UK; Warwick Clinical Trials Unit, University of Warwick, Warwick, UK.
3 Warwick Clinical Trials Unit, University of Warwick, Warwick, UK; University Hospitals of Coventry and Warwickshire, Coventry, UK.
4 Institute for Musculoskeletal Health, University of Sydney and Sydney Local Health District, Sydney, NSW 2050, Australia.