title: Comment on the letter by Howland.
authors.forename: J M
authors.initials: JM
authors.lastname: Kremer
mesh_terms: D000368:Aged; D001853:Bone Marrow / Q000187:drug effects* / Q000473:pathology; D003404:Creatinine / Q000097:blood; D006801:Humans; D008297:Male; D008727:Methotrexate / Q000633:toxicity*
chemical_list: D003404:Creatinine; D008727:Methotrexate