Analysis of the PHQ-15 by individual items: a systematic review and meta-analysis. - Boiko, Oleksandr; Barrio-Martínez, Sara; Priede, Amador; Ventura, Ludovica; Gómez-Carazo, Nerea; Hernández-Abellán, Aida; Setién-Suero, Esther; González-Blanch, César (Anxiety & Stress / Ansiedad y Estrés, 2022)