title: Plasma tryptophan in senile cataract.
mesh_terms: D000368:Aged; D001241:Aspirin / Q000494:pharmacology; D002386:Cataract / Q000097:blood* / Q000517:prevention & control; D006801:Humans; D014364:Tryptophan / Q000037:antagonists & inhibitors / Q000097:blood*
chemical_list: D014364:Tryptophan; D001241:Aspirin