[1] Univ Calif San Francisco, Div Hosp Med, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Palliat Care Program, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Sch Nursing, Dept Phys, San Francisco, CA 94143 USA
[4] Univ Calif Sacramento, Davis Med Ctr, Sacramento, CA USA
[5] Univ Calif Irvine, Irvine Hlth, Orange, CA 92668 USA
[6] Univ Calif Los Angeles, Med Ctr, Los Angeles, CA 90024 USA
[7] Univ Calif Los Angeles, Hosp Sect Palliat Care, Div Gen Internal Med, Los Angeles, CA USA
[8] Vitas Hosp, Encino, CA USA
[9] Univ Calif San Diego, San Diego Hlth, San Diego, CA 92103 USA
[10] Univ Calif San Francisco, Med Ctr, San Francisco, CA USA
[11] MedStar Georgetown Univ Hosp, Div Pulm Crit Care & Sleep Med, Washington, DC USA