[1] Vanderbilt Univ, Med Ctr, Dept Pediat, Div Adolescent Young Adult Hlth, Nashville, TN 37204 USA
[2] Univ Alabama Birmingham, Div Adolescent Med, Birmingham, AL USA
[3] Johns Hopkins Sch Nursing, Baltimore, MD USA
[4] Vanderbilt Univ, Med Ctr, Div Infect Dis, Nashville, TN USA
[5] WHO, Global HIV Hepatitis & STI Programmes, Geneva, Switzerland
[6] Paediat Adolescent Treatment Afr PATA Mowbray, Mowbray, South Africa
[7] Emory Univ, Sch Med, Atlanta, GA USA
[8] Childrens Natl Hosp, Div Adolescent & Young Adult Med, Washington, DC USA
[9] Univ Miami, Miller Sch Med Miami, Adolescent Med, Miami, FL USA
[10] Univ Oxford, Dept Social Policy & Intervent, Oxford, England