N/A: data not available. Criterion 1: specified eligibility criteria. Criterion 2: randomized allocation. Criterion 3: concealed allocation. Criterion 4: similarity between groups at baseline. Criterion 5: blinding of subjects. Criterion 6: blinding of therapists. Criterion 7: blinding of assessors. Criterion 8: outcome measures obtained from at least 85% of initially allocated subjects. Criterion 9: all received treatment, or key outcome, was analyzed by “intention-to-treat.” Criterion 10: between-group statistical comparison. Criterion 11: both point and variability measures provided.