[1] Palo Alto Med Fdn, Res Inst, 2350 W El Camino Real,4th Floor, Mountain View, CA 94040 USA
[2] Stanford Univ, Dept Econ, Stanford, CA 94305 USA
[3] Palo Alto Med Fdn, Dept Palliat Care, Santa Cruz, CA USA
[4] Palo Alto Med Fdn, Dept Palliat Care, Palo Alto, CA USA
[5] Mem Sloan Kettering Canc Alliance, Hartford Hlth Care Canc Inst, Hartford, CT USA
[6] Univ Calif San Francisco, Dept Med, Div Geriatr, San Francisco, CA USA