[1] Univ Calif San Francisco, Div Palliat Med, San Francisco, CA USA
[2] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL USA
[3] Univ Calif San Francisco, Div Hosp Med, Zuckerberg San Francisco Gen Hosp, San Francisco, CA USA
[4] Stanford Univ, Palo Alto, CA USA
[5] Stanford Univ Med Partners, Oakland, CA USA
[6] Hoag Mem Hosp, Newport Beach, CA USA
[7] Univ Calif San Francisco, Div Palliat Med, San Francisco CSB Box 0125, San Francisco, CA 94143 USA