Amin, Samy, Yasser Menaissy, and Waleed Gamal Abosenna. 2021. “Early Outcome of the Effect of Phosphodiesterase-5 Inhibitor on Pulmonary Hypertension in Patients Undergoing Mitral Valve Surgery”. International Journal of Health Sciences 5 (S2):1479-90. https://doi.org/10.53730/ijhs.v5nS2.15426.