1. Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
2. School of Medicine and Public Health, University of Newcastle, New South Wales, Australia
3. Neuroscience Research Australia (NeuRA), Sydney, New South Wales, Australia
4. School of Medical Sciences, Faculty of Medicine, University of New South Wales, Australia