1. Institute for Musculoskeletal Health Sydney Local Health District and The University of Sydney Sydney New South Wales Australia
2. Physical Therapy Sciences, Program in Clinical Health Sciences, University Medical Center Utrecht Utrecht University Utrecht The Netherlands
3. Centre for Statistics in Medicine, Rehabilitation Research in Oxford, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK
4. Emergency and Trauma Centre, Royal Brisbane and Women's Hospital The University of Queensland Brisbane Queensland Australia
5. Emergency Department Westmead Hospital Sydney New South Wales Australia
6. Emergency Department Prince of Wales Hospital Sydney New South Wales Australia
7. Emergency Department Royal North Shore Hospital Sydney New South Wales Australia
8. Emergency Department Liverpool Hospital Sydney New South Wales Australia
9. South Western Emergency Research Institute Liverpool Hospital Sydney New South Wales Australia