1 Département de médecine (Dinh, Kanji, Vaughan), Cumming School of Medicine, University of Calgary et Alberta Health Services; laboratoire provincial de santé publique (Kanji), Alberta Health Services; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases (Vaughan), University of Calgary et Alberta Health Services, Calgary, Alb.
2 Département de médecine (Dinh, Kanji, Vaughan), Cumming School of Medicine, University of Calgary et Alberta Health Services; laboratoire provincial de santé publique (Kanji), Alberta Health Services; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases (Vaughan), University of Calgary et Alberta Health Services, Calgary, Alb. stephen.vaughan@albertahealthservices.ca.