Firas, A.T. and Ilham, A.F. 2005. Effect of maintenance therapy for childhood with acute lymphoblastic leukaemia by combination of methotrexate and 6–mercaptopurine on the liver. Al Mustansiriyah Journal of Pharmaceutical Sciences. 2, 2 (Dec. 2005), 18–23. DOI:https://doi.org/10.32947/ajps.v2i2.430.