[1] Univ Calif San Francisco, Dept Pediat, Div Adolescent & Young Adult Med, San Francisco, CA USA
[2] Macquarie Univ, Ctr Emot Hlth, Dept Psychol, Sydney, NSW, Australia
[3] Univ Toronto, Factor Inwentash Fac Social Work, Toronto, ON, Canada
[4] Univ Texas Hlth Sci Ctr Houston, Dept Management Policy & Community Hlth, Houston, TX USA
[5] Johns Hopkins Univ, Johns Hopkins Bloomberg Sch Publ Hlth, Dept Populat, Family & Reprod Hlth, Baltimore, MD USA
[6] Charles R Drew Univ Med & Sci, Coll Med, Dept Family Med, Los Angeles, CA USA
[7] Charles R Drew Univ Med & Sci, Dept Urban Publ Hlth, Los Angeles, CA USA
[8] Charles R Drew Univ Med & Sci, Marginalizat Related Diminished Returns MDRs Res C, Los Angeles, CA USA
[9] Univ Southern Calif, Dept Psychiat & Behav Sci, Los Angeles, CA USA
[10] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA
[11] SRI Int, Ctr Hlth Sci, Menlo Pk, CA USA
[12] Univ Witwatersrand, Sch Physiol, Johannesburg, South Africa
[13] 550 16th St,4th Floor,Mailroom 4100,Box 0503, San Francisco, CA 94143 USA