1. University of Toronto, Center for Prognostic Studies in the Rheumatic Diseases, Toronto Western Hospital; Toronto Ontario Canada
2. University of Toronto, Krembil Research Institute, and Center for Prognostic Studies in the Rheumatic Diseases, Toronto Western Hospital; Toronto Ontario Canada
3. Center for Prognostic Studies in the Rheumatic Diseases, Toronto Western Hospital; and Krembil Research Institute, University Health Network; Toronto Ontario Canada