1. Department of Environmental Health Sciences, University of Michigan, School of Public Health, Ann Arbor, MI, USA
2. Center for Nutrition and Health Research, National Institute of Public Health (INSP), Cuernavaca, Morelos, Mexico
3. Academic Unit in Epidemiological Research, Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
4. Center for Research on Population Health, National Institute of Public Health, Cuernavaca, Morelos, Mexico