1. Carolina Population Center; University of North Carolina; Chapel Hill North Carolina USA
2. Department of Nutrition; Gillings School of Global Public Health; University of North Carolina; Chapel Hill North Carolina USA
3. Carolina Center for Genome Sciences; University of North Carolina; Chapel Hill North Carolina USA
4. Department of Epidemiology; University of North Carolina; Chapel Hill North Carolina USA
5. Department of Genetics; University of North Carolina; Chapel Hill North Carolina USA
6. Department of Sociology; University of North Carolina; Chapel Hill North Carolina USA