1 Monash Department of Clinical Epidemiology, Cabrini Institute, Malvern, VIC 3144, Australia Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, The Alfred Centre, Melbourne, Vic, Australia rachelle.buchbinder@monash.edu.
2 Whitlam Orthopaedic Research Centre, Ingham Institute for Applied Medical Research, South Western Sydney Clinical School, University of New South Wales, Liverpool, NSW, Australia.
3 Warwick Clinical Trials Unit, Warwick University, Coventry, UK.