title: Letter: Methotrexate interaction.
mesh_terms: D003561:Cytarabine / Q000037:antagonists & inhibitors*; D005493:Folic Acid Antagonists; D006801:Humans; D008727:Methotrexate / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D013997:Time Factors; D014500:Uracil Nucleotides / Q000037:antagonists & inhibitors
chemical_list: D005493:Folic Acid Antagonists; D014500:Uracil Nucleotides; D003561:Cytarabine; D008727:Methotrexate