1. From the Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University Health Centre Research Institute (D.M., A.T., C.V., K.H., M.-J.D., P.Z.L., K.S., A.B.), and the Department of Epidemiology and Biostatistics (D.M., A.B.), McGill University, Montreal, the Faculty of Medicine and Dentistry, University of Alberta, Edmonton (R.L.), the Faculty of Medicine, University of Saskatchewan, Saskatoon (V.H.), and the BC Centre for Disease Control and the University of British...