1 Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA. victoria.tang@ucsf.edu.
2 Geriatrics, Palliative, and Extended Care Service Line, San Francisco Veterans Affairs Medical Center, San Francisco, CA, USA. victoria.tang@ucsf.edu.
3 Division of Geriatrics, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA.
4 Geriatrics, Palliative, and Extended Care Service Line, San Francisco Veterans Affairs Medical Center, San Francisco, CA, USA.
5 School of Nursing, University of California, San Francisco, San Francisco, CA, USA.
6 Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA.
7 Department of Surgery, University of California, San Francisco, San Francisco, CA, USA.