Sicras-Mainar, Antoni, Ruth Navarro-Artieda, Amador Ruiz-Torrejón, and Alexandra Prados-Torres. “Estimation of Chronic Co-Morbidity on Health Costs in Elderly Patients With Neurological Disorders”. Revista Peruana de Medicina Experimental y Salud Pública 28, no. 3 (September 30, 2011). Accessed April 27, 2024. https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/541.