1. Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada (DD, NM)
2. Department of Pediatrics, University of Alberta, Edmonton, AB, Canada (DD)
3. Department of Health Sciences, University of Lethbridge, Lethbridge, AB, Canada (RD)
4. Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, AB, Canada (RD, KA, AB)
5. Provincial Population and Public Health, Alberta Health Services, Calgary, AB, Canada (KA)