1 University of Queensland, Herston, Queensland, Australia Public Health Division, Secretariat of the Pacific Community, Noumea, New Caledonia.
2 Institute of Bone and Joint Research, Royal North Shore Hospital, St Leonards, New South Wales, Australia.
3 University of Melbourne, Parkville, Victoria, Australia.
4 Concord Clinical School, University of Sydney, Concord West, Australia.
5 Department of Rheumatology, Royal Cornwall Hospital, Truro, UK.
6 Department of Rheumatology, University of Sydney, St Leonards, New South Wales, Australia.
7 Monash Department of Clinical Epidemiology, Cabrini Institute and Monash University, Mebourne, Victoria, Australia Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Victoria, Australia.