title: Letter: Megavitamin treatment in schizophrenia.
mesh_terms: D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D009539:Nicotinic Acids / Q000009:adverse effects / Q000627:therapeutic use; D010919:Placebos; D011569:Psychiatric Status Rating Scales; D012559:Schizophrenia / Q000188:drug therapy*; D012737:Sex Factors; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D009539:Nicotinic Acids; D010919:Placebos; D014815:Vitamins