[1] Brigham & Womens Hosp, Div Gen Internal Med & Primary Care, 1620 Tremont St, Boston, MA 02120 USA
[2] Harvard Med Sch, Boston, MA USA
[3] Univ Calif San Francisco, Dept Med, Div Gen Internal Med, San Francisco, CA USA
[4] Univ Calif San Francisco, Zuckerberg San Francisco Gen Hosp, Ctr Vulnerable Populat, San Francisco, CA USA
[5] Univ Calif Davis, Ctr Healthcare Policy & Res, Davis, CA USA
[6] Univ Calif Davis, Sch Med, Dept Publ Hlth Sci, Davis, CA USA