1 Anne C. Lusk is with the Department of Nutrition, Harvard School of Public Health, Boston, MA. Patrick Morency is with the Direction de santé publique de Montréal and the Département de médecine sociale et préventive, Université de Montréal, Montreal, Québec. Luis F. Miranda-Moreno is with the Department of Civil Engineering and Applied Mechanics, McGill University, Montreal. Walter C. Willett is with the Departments of Nutrition and Epidemiology, Harvard School of Public Health, and Brigham and Women's Hospital, Harvard Medical School, Boston. Jack T. Dennerlein is with Bouvé College of Health Sciences, Northeastern University and the Department of Environmental Health, Harvard School of Public Health.