1. Mayne Medical School, The University of Queensland; Centre of National Research on Disability and Rehabilitation Medicine; Level 3 Herston Road Brisbane Queensland Australia 4006
2. London Health Sciences Center; Department of Medicine; 375 South Street, Victoria Campus Suite 305, Colborne Building London ON Canada N6A 4G5
3. University of Ottawa; Bruyère Research Institute; 85 Primrose Street Ottawa ON Canada K1N 5C8
4. University of Queensland; Centre of National Research on Disability and Rehabiliation Medicine; Brisbane Australia
5. University of Ottawa; Department of Epidemiology and Community Medicine; Room H1281 40 Ruskin Street Ottawa ON Canada K1Y 4W7