[1] Univ Calif San Francisco, Dept Med, Div Geriatr, San Francisco, CA 94118 USA
[2] San Francisco VA Med Ctr, Geriatr Palliat & Extended Care Serv Line, San Francisco, CA 94121 USA
[3] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA
[4] Univ Calif San Francisco, Dept Physiol Nursing, San Francisco, CA USA
[5] Univ Calif San Francisco, Philip R Lee Inst Hlth Policy Studies, San Francisco, CA 94118 USA
[6] Icahn Sch Med, Brookdale Dept Geriatr & Palliat Med, New York, NY USA
[7] San Francisco VA Med, 4150 Clement St 181G, San Francisco, CA 94121 USA