Letter: Tryptophan/imipramine in depression.
D000328:Adult; D002986:Clinical Trials as Topic; D003863:Depression / Q000188:drug therapy*; D004341:Drug Evaluation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007099:Imipramine / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D014364:Tryptophan / Q000627:therapeutic use*
D014364:Tryptophan; D007099:Imipramine