Maryanne Crockett1, Lisa Avery2, James Blanchard3. 1. Departments of Pediatrics and Child Health, Medical Microbiology, Community Health Sciences, and Centre for Global Public Health, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada. 2. Departments of Medical Microbiology, Community Health Sciences, Obstetrics, Gynecology and Reproductive Sciences, and Centre for Global Public Health, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada. 3. Departments of Community Health Sciences and Centre for Global Public Health, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.