[1] Univ Calif Los Angeles, David Geffen Sch Med, Div Gen Internal Med & Hlth Serv Res, Los Angeles, CA 90095 USA
[2] Harvard Univ, Sch Med, Boston, MA USA
[3] Beth Israel Deaconess Med Ctr, Eth Support Serv, Boston, MA 02215 USA
[4] Beth Israel Deaconess Med Ctr, Palliat Care Programs, Boston, MA 02215 USA