[1] Univ Kentucky, Ctr Drug Alcohol Res, Lexington, KY 40536 USA
[2] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD 21201 USA
[3] Univ Calif San Diego, Dept Family & Prevent Med, Div Int Hlth & Cross Cultural Med, San Diego, CA 92103 USA
[4] Columbia Univ, Mailman Sch Publ Hlth, Dept Epidemiol, New York, NY 10032 USA
[5] New York Acad Med, Ctr Urban Epidemiol Studies, New York, NY 10029 USA
[6] Ctr Dis Control & Prevent, Natl Ctr Injury Prevent & Control, Atlanta, GA 30333 USA
[7] Natl Dev & Res Inst Inc, New York, NY 10010 USA
[8] Louisiana State Univ, Sch Med, New Orleans, LA 70112 USA
[9] Univ Illinois, Sch Publ Hlth, Div Epidemiol & Biostat, Chicago, IL 60612 USA
[10] Los Angeles Cty Dept HlthServ, Sexually Transmitted Dis Program, Los Angeles, CA 90012 USA
[11] Ctr Dis Control & Prevent, Div HIV AIDS Prevent, Natl Ctr HIV STD & TB Prevent, Atlanta, GA 30333 USA