[1] Childrens Hosp Philadelphia, Justin Michael Ingerman Ctr Palliat Care, Philadelphia, PA 19104 USA
[2] Dana Farber Canc Inst, Dept Psychosocial Oncol, Boston, MA 02215 USA
[3] Boston Childrens Hosp, Dept Pediat, Boston, MA 02115 USA
[4] Univ Penn, Perelman Sch Med, Div Gen Pediat, Philadelphia, PA 19104 USA