1. Ingham Institute for Applied Medical Research; South Western Sydney Clinical School, UNSW; Sydney New South Wales Australia
2. Sydney School of Public Health; The University of Sydney; Sydney New South Wales Australia
3. Department of Orthopaedics; Prince of Wales Hospital; Sydney New South Wales Australia
4. Monash Department of Clinical Epidemiology; Cabrini Institute; Melbourne Victoria Australia
5. Department of Epidemiology and Preventive Medicine; School of Public Health and Preventive Medicine, Monash University; Melbourne Victoria Australia