title: Negative results of a trial of penicillamine in chronic schizophrenia.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D010396:Penicillamine / Q000627:therapeutic use*; D010919:Placebos; D012559:Schizophrenia / Q000188:drug therapy*
chemical_list: D010919:Placebos; D010396:Penicillamine