Huamán-Espino, Lucio, Juan Pablo Aparco, and Jenny Pillaca. “Limitations of Secondary Analysis of Databases”. Revista Peruana de Medicina Experimental y Salud Pública 30, no. 1 (February 8, 2014). Accessed November 21, 2024. https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/179.