- Clinical and sociodemographic predictors of response to augmentation, or dose increase among depressed outpatients resistant to fluoxetine 20 mg/day. Perlis, R.H., Alpert, J., Nierenberg, A.A., Mischoulon, D., Yeung, A., Rosenbaum, J.F., Fava, M. Acta psychiatrica Scandinavica. (2003)