Affiliation: | 1. Department of Family Relations and Applied Nutrition, University of Guelph, , Guelph, Ontario, Canada;2. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, , Minneapolis, Minnesota, USA;3. Department of Obstetrics & Gynecology, University of Texas Medical Branch, , Galveston, Texas, USA;4. Division of Adolescent Health and Medicine, Department of Pediatrics, University of Minnesota, , Minneapolis, Minnesota, USA |