Allopurinol increases DNA-thioguanine nucleotides during maintenance therapy in pediatric acute lymphoblastic leukemia - Källström, Jonatan; Niinimäki, Riitta; Fredlund, Johan; Vogt, Hartmut; Korhonen, Laura S.; Castor, Anders; Schmiegelow, Kjeld; Thastrup, Maria; Ek, Torben (Ferrata Storti Foundation (Haematologica), 2026)