title: Letter: Treatment of unpolar depression.
mesh_terms: D001205:Ascorbic Acid / Q000627:therapeutic use; D003863:Depression / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D006801:Humans; D011736:Pyridoxine / Q000627:therapeutic use; D014364:Tryptophan / Q000627:therapeutic use*
chemical_list: D014364:Tryptophan; D011736:Pyridoxine; D001205:Ascorbic Acid