[1] Univ Ulm, Inst Pharmacol Nat Prod & Clin Pharmacol, Ulm, Germany
[2] Univ Hosp Munster, Dept Phoniatr & Pediat Audiol, Munster, Germany
[3] Univ Hosp Children & Adolescents, Dept Pediat Oncol & Hematol, Lubeck, Germany
[4] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[5] Ist Giannina Gaslini, Genoa, Italy
[6] Univ Hosp Brno, Dept Pediat Oncol, Brno, Czech Republic
[7] Motol Teaching Hosp, Dept Children Hematooncol, Prague, Czech Republic
[8] Danish Canc Soc Res Ctr, Copenhagen, Denmark
[9] Med Univ Graz, Dept Paediat & Adolescent Med, Graz, Austria
[10] Klinikum Stuttgart Olgahosp, Ctr Pediat Adolescent & Womens Med, Stuttgart, Germany
[11] Princess Maxima Ctr Pediat Oncol, Utrecht, Netherlands
[12] Univ Hosp Bonn, Dept Paediat Haematol & Oncol, Bonn, Germany
[13] Univ Erlangen Nurnberg, Hosp Children & Adolescents, Erlangen, Germany
[14] Acad Med Ctr, Emma Childrens Hosp, Dept Pediat Oncol, Amsterdam, Netherlands
[15] Erasmus MC Sophia Childrens Hosp, Dept Pediat Hematol & Oncol, Rotterdam, Netherlands