[1] Ctr Dis Control & Prevent, Div Sexually Transmitted Dis Prevent, Atlanta, GA USA
[2] Fenway Hlth, Fenway Inst, Boston, MA USA
[3] Columbia Univ, Jonas Nursing & Vet Healthcare, New York, NY USA
[4] Community Hlth Ctr Inc, Weitzman Inst, Middletown, CT USA
[5] Univ Pittsburgh, Grad Sch Publ Hlth, Pittsburgh, PA USA