1. Institute of Nutrition and Food Technology, University of Chile , 7830490 Santiago , Chile
2. Population Sciences in the Pacific Program (Cancer Epidemiology), University of Hawai'i Cancer Center , Honolulu, HI 96822 , USA
3. Department of Epidemiology, Fielding School of Public Health, University of California , Los Angeles, CA 90095-1772 , USA
4. Department of Nutrition and Dietetics, Faculty of Health Sciences, University of Atacama , 1530000 Copiapó , Chile
5. Institute for Prevention and Cancer Epidemiology, Faculty of Medicine and Medical Center, University of Freiburg , 79110 Freiburg , Germany
6. Institute of Maternal and Child Research, Faculty of Medicine, University of Chile , 8360160 Santiago , Chile