[1] Karolinska Inst, Sodersjukhuset, Dept Clin Sci & Educ, S-11883 Stockholm, Sweden
[2] Karolinska Inst, Div Nursing, Dept Neurobiol Care Sci & Soc, Stockholm, Sweden
[3] Karolinska Univ Hosp, Karolinska Comprehens Canc Ctr, Stockholm, Sweden
[4] Harvard Med Sch, Dept Pediat, Boston, MA USA
[5] Boston Childrens Hosp, Dept Pediat, Boston, MA USA
[6] Dana Farber Canc Inst, Dept Psychosocial Oncol & Palliat Care, Boston, MA USA
[7] Seattle Childrens Res Inst, Seattle, WA USA