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