[1] Duke Univ, Social Sci Res Inst, Ctr Genom, Race,Ident,Difference GRID, C103C,Box 90420, Durham, NC 27708 USA
[2] North Carolina A&T State Univ, Joint Sch Nanosci & Nanoengn, 2907 East Gate City Blvd, Greensboro, NC 27401 USA
[3] Duke Univ, Social Sci Res Inst, Ctr Genom, Race,Ident,Difference GRID, C103a,Box 90420, Durham, NC 27708 USA
[4] Emory & Henry Coll, Dept Phys Assistant Studies, 565 Radio Hill Rd, Marion, VA 24354 USA
[5] Duke Univ, Dept Polit Sci, 279 Gross Hall, Durham, NC 27708 USA
[6] Old Dominion Univ, Sch Community & Environm Hlth, Norfolk, VA 23508 USA
[7] Univ Oklahoma, Dept Anthropol, 455 West Lindsey St,DHT 511, Norman, OK 73019 USA
[8] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Biostat, Chapel Hill, NC 27599 USA
[9] Duke Univ, Social Sci Res Inst, Ctr Genom, Race,Ident,Difference GRID, C103f,Box 90420, Durham, NC 27708 USA