[1] Columbia Univ, Med Ctr, Adult Palliat Care Serv, Dept Med, 601 W 168th St,Suite 38, New York, NY 10032 USA
[2] Harvard Univ, Sch Med, Div Palliat Care, Massachusetts Gen Hosp,Dept Med, Boston, MA 02115 USA
[3] Harvard Univ, Sch Med, Ctr Palliat Care, Boston, MA 02115 USA