[1] University of North Carolina at Chapel Hill,Department of Epidemiology
[2] Gillings School of Global Public Health,Department of Epidemiology
[3] Carolina Population Center,Department of Sociology
[4] University of North Carolina at Chapel Hill,Department of Sociology
[5] Mailman School of Public Health,undefined
[6] Columbia University,undefined
[7] University of Utah,undefined
[8] Salt Lake City,undefined
[9] University of North Carolina at Chapel Hill,undefined