1 From the Metabolic Diseases Research Unit, National Institute of Medical Sciences and Nutrition Salvador Zubiran, Mexico City, Mexico; The Tecnologico de Monterrey, School of Medicine, Mexico City, Mexico.
2 The Department of Dietetics & Nutrition, University of Arkansas for Medical Sciences, Little Rock, AR, United States; The Arkansas Children's Nutrition Center, Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, United States.
3 The Harvard Medical School, Boston, MA, United States.
4 The Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, MN, United States.
5 The Harvard Medical School, Boston, MA, United States; The New Balance Foundation Obesity Prevention Center, Boston Children's Hospital, Boston MA, United States.
6 The Harvard Medical School, Boston, MA, United States; The New Balance Foundation Obesity Prevention Center, Boston Children's Hospital, Boston MA, United States; The Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark. Electronic address: david.ludwig@childrens.harvard.edu.