1. From the Departments of Community Health Sciences (H.Q., B.R.H., G.C., N.C., M.D.H., W.A.G.) and Medicine (B.R.H., N.C., M.D.H., W.A.G.), University of Calgary, Calgary, Alberta, Canada; Department of Medicine (N.K.), University of British Columbia, Vancouver, British Columbia, Canada; Institute for Clinical Evaluative Sciences (K.T.), Toronto, Ontario, Canada; Department of Family and Community Medicine (K.T.), University of Toronto, Toronto, Ontario, Canada; Department of Medicine (F.A.M.),...