1. Rheumatology Department; Royal North Shore Hospital; Sydney New South Wales Australia
2. School of Medicine; University of Sydney; Sydney New South Wales Australia
3. Institute of Bone and Joint Research; Kolling Institute of Medical Research; University of Sydney; Sydney New South Wales Australia
4. Physiotherapy Department; Royal North Shore Hospital; Sydney New South Wales Australia
5. Department of Physiotherapy, Occupational Therapy and Speech Therapy; School of Medicine; University of Sao Paulo; Sao Paulo Brazil