[1] Univ Calif San Francisco, Zuckerberg San Francisco Gen Hosp & Trauma Ctr, Ctr Vulnerable Populat, UCSF Box 1364, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Zuckerberg San Francisco Gen Hosp, Dept Med, Div Gen Internal Med, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Dept Med, Div Geriatr, San Francisco, CA 94143 USA
[4] Cornell Univ, Weill Cornell Med Coll, Ithaca, NY USA
[5] Univ Calif Berkeley, San Francisco Joint Med Program, UC Berkeley Sch Publ Hlth, Berkeley, CA 94720 USA
[6] Univ Calif San Francisco, Sch Med, San Francisco, CA 94143 USA