1. C.-W.C. Lin, PT, PhD, is Research Fellow, Musculoskeletal Division, The George Institute for International Health and Sydney Medical School, The University of Sydney, PO Box M201, Missenden Rd, Sydney, New South Wales 2050, Australia.
2. D. Taylor, PT, BAppSc(Phty), is Senior Musculoskeletal Physiotherapist, Physiotherapy Department, Royal North Shore Hospital, Pacific Highway, St Leonards, New South Wales 2065, Australia.
3. S.M.A. Bierma-Zeinstra, PhD, is Associate Professor, Department of General Practice, Erasmus MC University Medical Center, PO Box 2040, 3000 CA, Rotterdam, the Netherlands.
4. C.G. Maher, PT, PhD, is Director, Musculoskeletal Division, The George Institute for International Health and Professor, Sydney Medical School, The University of Sydney, PO Box M201, Missenden Rd, Sydney, New South Wales 2050, Australia.