Predicting future major depression and persistent depressive symptoms: Development of a prognostic screener and PHQ-4 cutoffs in breast cancer patients.

Weihs KL, Wiley JF, Crespi CM, Krull JL, Stanton AL. "Predicting future major depression and persistent depressive symptoms: Development of a prognostic screener and PHQ-4 cutoffs in breast cancer patients." Psychooncology. 2018;27(2):420-426.