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