“Handheld Portable Ultrasound As an Affordable Alternative in Resource-Limited Countries: A Single-Center Observational Study”. Revista de la Sociedad Ecuatoriana de Nefrología, Diálisis y Trasplante 14, no. 1 (October 16, 2025): 30–38. Accessed April 30, 2026. http://signin.immowelt.de.rev-sen.ec/index.php/revista/article/view/121.