1. Palo Alto Medical Foundation Research Institute, Mountain View, California.
2. Research, Development, and Dissemination, Sutter Health, Concord, California.
3. Palliative Care Department, Palo Alto Medical Foundation, Santa Cruz, California.
4. Geriatric Medicine Department, Palo Alto Medical Foundation, Palo Alto, California.
5. School of Public Health, University of California, Berkeley, Berkeley, California.