[1] Brown Univ, Sch Publ Hlth, Dept Epidemiol, Ctr Epidemiol Res, 121 South Main St,Box G-S121-2, Providence, RI 02912 USA
[2] Univ Delaware, Program Epidemiol, Newark, DE USA
[3] Univ Alabama Birmingham, Dept Med, Div Infect Dis, Ctr AIDS Res, Birmingham, AL USA
[4] Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Dept Med, Div Infect Dis,Sch Med,Dept Epidemiol, Chapel Hill, NC USA
[5] Brown Univ, Warren Alpert Med Sch, Miriam Hosp, Ctr Behav & Prevent Med,Dept Psychiat & Human Beha, Providence, RI USA
[6] Univ Miami, Dept Psychol, Coral Gables, FL USA
[7] Univ Delaware, Dept Human Dev & Family Sci, Newark, DE USA
[8] Brown Univ, Sch Publ Hlth, Ctr Hlth Promot & Hlth Equ, Dept Behav & Social Sci, Providence, RI USA