[1] Stanford Sch Med, Dept Epidemiol & Populat Hlth, Stanford, CA 94305 USA
[2] Univ Calif Riverside, Dept Social Med Populat & Publ Hlth, Sch Med, Riverside, CA 92521 USA
[3] Univ Calif Los Angeles, Geffen Sch Med, Dept Gen Internal Med & Hlth Serv Res, Los Angeles, CA USA
[4] Univ Calif Irvine, Inst Clin & Transnat Sci, Irvine, CA 92717 USA
[5] Cultiva Salud, United Way Merced Cty, Merced, CA USA
[6] Univ Calif Merced, Dept Publ Hlth, Merced, CA USA