1. Palo Alto Medical Foundation Research Institute, Mountain View, CA, USA
2. Department of Economics, Stanford University, Stanford, CA, USA
3. Palo Alto Medical Foundation, Department of Palliative Care, Santa Cruz, CA, USA
4. Palo Alto Medical Foundation, Department of Palliative Care, Palo Alto, CA, USA
5. Hartford Health Care Cancer Institute, Memorial Sloan Kettering Cancer Alliance, Hartford, CT, USA
6. Division of Geriatrics, Department of Medicine, University of California, San Francisco, CA, USA