title: Letter: Intra-articular methotrexate.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D007270:Injections, Intra-Articular; D007719:Knee Joint; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage* / Q000627:therapeutic use; D008875:Middle Aged; D011565:Psoriasis / Q000150:complications
chemical_list: D008727:Methotrexate