[1] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94158 USA
[2] Univ Calif San Francisco, Dept Pediat, San Francisco, CA 94158 USA
[3] Univ Calif San Francisco, Dept Med, San Francisco, CA 94110 USA
[4] Univ Calif San Francisco, Dept Psychiat & Behav Sci, 490 Illinois St, San Francisco, CA 94110 USA
[5] Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, 490 Illinois St, San Francisco, CA 94158 USA