[1] Univ Oklahoma, Ctr Appl Social Res, 5 Partners Pl,201 Stephenson Pkwy,Suite 4100, Norman, OK 73072 USA
[2] Duke Univ, Ctr Genom Race Ident Difference GRID, SSRI, 2024 West Main St,Erwin Sq Mill Bldg,Bay C, Durham, NC 27705 USA
[3] Duke Univ, Dept African & African Amer Studies, 234 Friedl Bldg,Box 90252, Durham, NC 27708 USA
[4] Duke Univ, Dept Biol, 234 Friedl Bldg,Box 90252, Durham, NC 27708 USA