1. Department of Nutrition; Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill; Chapel Hill USA
2. Carolina Population Center; University of North Carolina at Chapel Hill; Chapel Hill USA
3. Department of Biostatistics; Gillings School of Global Public Health, University of North Carolina at Chapel Hill; Chapel Hill USA
4. Department of Anthropology; University of North Carolina at Chapel Hill; Chapel Hill USA
5. Department of Epidemiology; Gillings School of Global Public Health, University of North Carolina at Chapel Hill; Chapel Hill USA
6. National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention; Beijing China