Diaz, Silvia, and Michael Salirrosas. “Metastatic Prostate Cancer Associated With Low Levels of Prostate-Specific Antigen”. Revista Peruana de Medicina Experimental y Salud Pública 29, no. 4 (February 5, 2014). Accessed May 5, 2024. https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/401.