1 From the Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada (JLS; TMSW, e-mail: [email protected]); the Clinical Nutrition and Risk Factor Modification Centre, St. Michael's Hospital, Toronto, Ontario, Canada (LSAA); Boden Institute of Obesity, Nutrition, Exercise, and Eating Disorders, University of Sydney, Sydney, Australia (JCB-M); the Glycemic Index Foundation of South Africa, Nelspruit, South Africa (ED); Independent Nutrition Logic, Wymondham, United Kingdom (GL); and the New Balance Foundation Obesity Prevention Center, Boston Children's Hospital and Harvard Medical School, Boston, MA (DSL).