1. Institute of Nutrition of Central America and Panama (INCAP) Research Center for the Prevention of Chronic Diseases Institute of Nutrition of Central America and Panama Guatemala City Guatemala
2. Slone Epidemiology Center Boston University Boston Massachusetts USA
3. Division of Cancer Epidemiology and Genetics National Cancer Institute Bethesda Maryland USA
4. Department of Nutrition, Harvard T.H. Chan School of Public Health Harvard University Boston Massachusetts USA
5. Information Management Services Colesville Maryland USA
6. Department of General Internal Medicine, School of Medicine Johns Hopkins University Baltimore Maryland USA
7. Department of Epidemiology, Bloomberg School of Public Health Johns Hopkins University Baltimore Maryland USA
8. Department of Environmental Health and Engineering, Bloomberg School of Public Health Johns Hopkins University Baltimore Maryland USA