[1] Emma Childrens Hosp, Acad Med Ctr, Psychosocial Dept G8 136, Amsterdam, Netherlands
[2] Laurentian Univ, Sch Rural & Northern Hlth, Sudbury, ON, Canada
[3] Princess Maxima Ctr Pediat Oncol, Utrecht, Netherlands
[4] Univ Ottawa, Childrens Hosp Eastern Ontario, Div Hematol Oncol, Ottawa, ON, Canada