1. CG Maher, PhD, is Director, Musculoskeletal Division, The George Institute for International Health, PO Box M201, Missenden Road, Sydney, NSW 2050, Australia, and Professor, Faculty of Medicine, University of Sydney, Lidcombe, NSW, Australia
2. AM Moseley, PhD, is Senior Research Fellow, The George Institute for International Health and Faculty of Medicine, University of Sydney
3. C Sherrington, PhD, is Senior Research Fellow, The George Institute for International Health and Faculty of Medicine, University of Sydney
4. MR Elkins, PhD, is Research Physiotherapist, Royal Prince Alfred Hospital, Sydney
5. RD Herbert, PhD, is Associate Professor, The George Institute for International Health and Faculty of Medicine, University of Sydney