1 Krembil Research Institute, Toronto Western Hospital, University Health Network; Division of Rheumatology, Department of Medicine, and Institute of Medical Science, University of Toronto.
2 Krembil Research Institute, Toronto Western Hospital, University Health Network; Division of Rheumatology, Department of Medicine, and Department of Laboratory Medicine and Pathobiology, and Institute of Medical Science, University of Toronto.
3 Krembil Research Institute, Toronto Western Hospital, University Health Network; Division of Rheumatology, Department of Medicine, and Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada. dafna.gladman@utoronto.ca.