1. A.M. Hall, BKIN, MPE, is a PhD candidate, The George Institute for International Health, Faculty of Medicine, The University of Sydney, PO Box M201, Missenden Road, Sydney, New South Wales, 2050 Australia.
2. P.H. Ferreira, PhD, is Lecturer, Faculty of Health Sciences, The University of Sydney.
3. C.G. Maher, PT, PhD, is Director, Musculoskeletal Division, The George Institute for International Health and Professor, Faculty of Medicine, Sydney Medical School, The University of Sydney.
4. J. Latimer, PT, PhD, is Associate Professor, Faculty of Medicine, Sydney Medical School, The University of Sydney.
5. M.L. Ferreira, BPhty, MSc, PhD, is Postdoctoral Fellow, Faculty of Health Sciences, The University of Sydney.