1 Department of Medicine, McGill University, Montreal, Canada.
2 Department of Medicine, Jewish General Hospital, Montreal, Canada; Center for Clinical Epidemiology, Lady Davis Institute, Montreal, Canada. Electronic address: susan.kahn@mcgill.ca.
3 Department of Medicine, Jewish General Hospital, Montreal, Canada.
4 Center for Clinical Epidemiology, Lady Davis Institute, Montreal, Canada.
5 Department of Medicine, Dalhousie University, Halifax, Canada.
6 Department of Medicine, University of Ottawa, Ottawa Hospital Research Institute, Ottawa, Canada.
7 Department of Medicine, Division of Hematology, Western University, London, Canada.
8 Department of Cardiology, Ben Gurion University, Beer Sheva, Israel.
9 Department of Diagnostic Imaging, University of Ottawa, Ottawa, Canada.
10 Department of Nuclear Medicine, Jewish General Hospital, Montreal, Canada.
11 Division of Respirology, Department of Medicine, University of Toronto, Toronto, Canada.