1. Environmental Epidemiology Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA
2. Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
3. Centro de Investigación de Salud Poblacional, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México
4. Department of Neurology, Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
5. Departments of Nutrition,
6. Society, Human Development, and Health, and
7. Occupational Health Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA