[1] Univ Southern Calif, Canc & Blood Dis Inst, Childrens Hosp Los Angeles, Los Angeles, CA USA
[2] Univ Southern Calif, Keck Sch Med, Los Angeles, CA USA
[3] Duke Univ, Sch Med, Dept Populat Hlth Sci, Durham, NC USA
[4] Dana Farber Canc Inst, Boston, MA 02115 USA
[5] Boston Childrens Hosp, Boston, MA USA
[6] UPMC, Childrens Hosp, Pittsburgh, PA USA
[7] Univ Pittsburgh, Sch Med, Pittsburgh, PA USA
[8] Duke Univ, Sch Med, Durham, NC USA
[9] St Jude Childrens Res Hosp, Div Qual Life & Palliat Care, Memphis, TN 38105 USA
[10] Childrens Natl Hosp, Div Oncol, Washington, DC USA
[11] George Washington Univ, Sch Med & Hlth Sci, Washington, DC 20052 USA
[12] Duke Univ, Durham, NC USA
[13] Clemson Univ, Sch Nursing, Clemson, SC USA
[14] Hosp Sick Children, Peter Gilgan Ctr Res & Learning, Toronto, ON, Canada
[15] Childrens Hosp Los Angeles, Los Angeles, CA 90027 USA
[16] George Washington Univ, Sch Med & Hlth Sci, Dept Nursing Sci, Childrens Natl Hosp, Washington, DC 20052 USA
[17] Duke Univ, Sch Med, Dept Pediat, Durham, NC USA