[1] Univ Calif Los Angeles, Dept Med, David Geffen Sch Med, Los Angeles, CA USA
[2] Cedars Sinai Med Ctr, Div Gen Internal Med, Los Angeles, CA USA
[3] Univ Calif Los Angeles, Multicampus Program Geriatr Med & Gerontol, David Geffen Sch Med, Los Angeles, CA USA
[4] Univ Calif Los Angeles, Div Gen Internal Med & Hlth Serv Res, David Geffen Sch Med, Los Angeles, CA USA
[5] Univ Calif Los Angeles, Greater Los Angeles Vet Affairs Healthcare Syst, David Geffen Sch Med, Los Angeles, CA USA
[6] UCLA, Dept Hlth Policy & Management, Fielding Sch Publ Hlth, Los Angeles, CA USA