1. Centro de Investigación en Sociedad y Salud y Núcleo Milenio de Sociomedicina, Las Condes, Santiago 7550000, Chile
2. Department of Epidemiology and Biostatistics, University of California, San Francisco, CA 90095, USA
3. Department of Pediatrics, Division of Child Development and Community Health, University of California, San Diego, CA 92093, USA
4. Institute of Nutrition and Food Technology, University of Chile, Macul, Santiago 7810000, Chile
5. Department of Pediatrics, University of Michigan, Ann Arbor, MI 48109, USA