Calderón, María, Juan Antonio Gálvez-Buccollini, Gloria Cueva, Carlos Ordoñez, Carlos Bromley, and Fabián Fiestas. “Validation of the Peruvian Version of the PHQ-9 for Diagnosing Depression”. Revista Peruana de Medicina Experimental y Salud Pública 29, no. 4 (February 6, 2014). Accessed May 1, 2024. https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/409.