augmentation
Clarification of        its efficacy as an augmentation therapy and in patients with refractory       depression and its role in improving the efficacy and reducing the extrapyramidal       effects of antipsychotic drugs would also help to establish its clinical value.
Clarification of        its efficacy as an  @SUBJECT$  @PREDICAT$  @OBJECT$  and in patients with refractory       depression and its role in improving the efficacy and reducing the extrapyramidal       effects of antipsychotic drugs would also help to establish its clinical value.