title: Letter: NAD and chronic schizophrenia.
mesh_terms: D002908:Chronic Disease; D004341:Drug Evaluation; D004359:Drug Therapy, Combination; D006801:Humans; D009243:NAD / Q000627:therapeutic use*; D009536:Niacinamide / Q000627:therapeutic use; D009539:Nicotinic Acids / Q000627:therapeutic use; D012559:Schizophrenia / Q000188:drug therapy*
chemical_list: D009539:Nicotinic Acids; D009243:NAD; D009536:Niacinamide