[1] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Ctr Hlth Policy Res, Los Angeles, CA USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Ctr Hlth Policy Res, 10960 Wilshire Blvd,Suite 1550, Los Angeles, CA 90024 USA
[4] Univ Calif Los Angeles, Hlth Econ & Evaluat Res, Ctr Hlth Policy Res, Los Angeles, CA USA
[5] Calif Childrens Serv, Calif Dept Hlth Care Serv, Sacramento, CA USA
[6] Calif Dept Hlth Care Serv, Med Policy & Consultat Sect, Syst Care Div, Sacramento, CA USA
[7] UCLA, Fielding Sch Publ Hlth, Los Angeles, CA USA