1. Department of Medicine Temerty Faculty of Medicine University of Toronto Ontario Canada Toronto
2. Centre for Prognosis Studies in the Rheumatic Diseases Krembil Research Institute Toronto Western Hospital University Health Network Toronto Ontario Canada
3. Schroeder Arthritis Institute Krembil Research Institute University Health Network
4. Division of Rheumatology Department of Medicine Temerty Faculty of Medicine University of Toronto Ontario Canada Toronto
5. Institute of Medical Science University of Toronto Ontario Canada Toronto