1. Division of Rheumatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
2. Rheumatology Unit, Department of Medicine, King Saud University, Saudi Arabia
3. College of Medicine Research Center, King Saud University, Saudi Arabia
4. Centre for Prognosis in Rheumatic Diseases, University Health Network, Canada
5. Institute of Health Policy, Management and Evaluation, University of Toronto, Canada
6. Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, Canada
7. Program in Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada