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.