“Cardiac Function Determined by Two-Dimensional Transthoracic Echocardiography in a Cohort of Venezuelans Copd Patients”. Revista Venezolana de Salud Pública, vol. 9, no. 1, May 2021, pp. 2-19, https://revistas2.uclave.org/index.php/rvsp/article/view/3236.