1 Vasculitis Clinic, Canadian Network for Research on Vasculitides, Department of Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal.
2 Division of Immunology and Allergy, Department of Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal, Montreal, Quebec, Canada.
3 Vasculitis Clinic, Canadian Network for Research on Vasculitides, Department of Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal; jean-paul.makhzoum@umontreal.ca.