1 Institute for Musculoskeletal Health and Faculty of Medicine and Health, School of Public Health, University of Sydney, NSW 2050, Australia. Electronic address: mary.okeeffe@sydney.edu.au.
2 Institute for Musculoskeletal Health and Faculty of Medicine and Health, School of Public Health, University of Sydney, NSW 2050, Australia.
3 Monash Department of Clinical Epidemiology, Cabrini Institute, and Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC, Australia.