[1] St Jude Childrens Res Hosp, Dept Oncol, Div Qual Life & Palliat Care, 262 Danny Thomas Pl,Mail Stop 260, Memphis, TN 38105 USA
[2] Le Bonheur Childrens Hosp, Dept Pediat, Memphis, TN USA
[3] Univ Tennessee, Hlth Sci Ctr, Dept Pediat, Memphis, TN USA
[4] Ohio Univ, Heritage Coll Osteopath Med, Cleveland, OH USA
[5] Dana Farber Canc Inst, Dept Psychosocial Oncol & Palliat Care, Div Pediat Palliat Care, Boston, MA 02115 USA
[6] Boston Childrens Hosp, Dept Psychosocial Oncol & Palliat Care, Div Pediat Palliat Care, Boston, MA USA