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.