[1] Boston Childrens Hosp, Dept Pediat, Boston, MA USA
[2] Boston Med Ctr, Dept Pediat, Boston, MA USA
[3] Dana Farber Canc Inst, Dept Pediat Oncol, Boston, MA 02115 USA
[4] Dana Farber Canc Inst, Div Populat Sci, Boston, MA 02115 USA
[5] Dana Farber Canc Inst, Dept Psychosocial Oncol & Palliat Care, Boston, MA 02115 USA
[6] Harvard Med Sch, Boston, MA 02115 USA
[7] Vrije Univ Amsterdam, Emma Childrens Hosp, Canc Ctr Amsterdam, Amsterdam UMC,Dept Pediat Oncol, Amsterdam, Netherlands
[8] Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA
[9] Princess Maxima Ctr Pediat Oncol, Utrecht, Netherlands
[10] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[11] Ctr Addict & Mental Hlth, Toronto, ON, Canada