Ceyhun, G., and G. Erbay. “The Relationship Between ProNT BNP Levels and Erectile Dysfunction in Patients With Chronic Congestive Heart Failure”. Annals of Medical Research, vol. 28, no. 4, May 2021, pp. 0652-6, http://www.annalsmedres.org/index.php/aomr/article/view/479.