[1] Univ Ghent, Dept Expt Clin & Hlth Psychol, Ghent, Belgium
[2] Antwerp Univ Hosp, Dept Pediat Oncol, Antwerp, Belgium
[3] Univ Hosp Brussels, Dept Pediat Oncol, Brussels, Belgium
[4] Ghent Univ Hosp, Dept Pediat Hematol Oncol & Stem Cell Transplanta, Ghent, Belgium
[5] Univ Hosp Leuven, Dept Pediat, Leuven, Belgium