The effect of asparaginase therapy on methotrexate toxicity and efficacy in children with acute lymphoblastic leukemia. - Kloos, Robin Q. H.; Pieters, Rob; van den Bos, Cor; van Eijkelenburg, Natasha K. A.; de Jonge, Robert; van der Sluis, Inge M. (Leukemia & Lymphoma, 2019)