Villanueva Bendek, Ignacio, Mauricio Ruiz, and Lia Vega. 2019. “Use of Ultrasound for Safe Cannulation of Difficult Arteriovenous Fistules in Hemo Dialysis”. Revista Colombiana De Nefrología 6 (1):48-56. https://doi.org/10.22265/acnef.6.1.297.