1. Department of Environmental Health, Harvard School of Public Health, Boston
2. Mineral Bioavailability Laboratory, Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA
3. Department of Pediatrics, Boston University School of Medicine and Boston Medical Center, Boston, MA
4. Institute for Biomedicine, Anhui Medical University, Anhui, China
5. Center for Ecogenetics and Reproductive Health, Beijing Medical University, Beijing, China