[1] Ann & Robert H Lurie Childrens Hosp Chicago, Div Adolescent Med, 225 E Chicago Ave,Box 161, Chicago, IL 60611 USA
[2] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[3] Univ Illinois, Sch Publ Hlth, Div Epidemiol & Biostat, Chicago, IL USA
[4] Univ Chicago, Chicago Ctr HIV Eliminat, Chicago, IL 60637 USA
[5] Univ Chicago, Dept Med, 5841 S Maryland Ave, Chicago, IL 60637 USA
[6] Univ Chicago, Sch Social Serv Adm, Chicago, IL 60637 USA
[7] Univ Chicago, STI HIV Intervent Network, Chicago, IL 60637 USA
[8] Univ Chicago, Dept Publ Hlth Sci, Chicago, IL 60637 USA