[1] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Populat Family & Reprod Hlth, 615 N Wolfe St,E4143, Baltimore, MD 21205 USA
[2] Michigan State Univ, Dept Human Dev & Family Studies, E Lansing, MI 48824 USA
[3] Univ Calif San Diego, Sch Med, Dept Med, Div Global Publ Hlth,Ctr Gender Equ & Hlth, La Jolla, CA 92093 USA
[4] Univ Pittsburgh, Grad Sch Publ Hlth, Dept Behav & Community Hlth Sci, Pittsburgh, PA USA
[5] Univ Calif Davis, Sch Med, Dept Pediat, Sacramento, CA 95817 USA
[6] VA Pittsburgh Hlth Care Syst, Ctr Hlth Equ Res & Promot, Pittsburgh, PA USA
[7] Univ Pittsburgh, Sch Med, Dept Med, Pittsburgh, PA 15213 USA
[8] Univ Pittsburgh, Sch Med, Dept Pediat, Div Adolescent & Young Adult Med, Pittsburgh, PA 15261 USA