“COMPARISON OF THE EFFECT OF SILDENAFIL AND TADALAFIL ON PULMONARY HYPERTENSION ASSOCIATED WITH HEMODYNAMICALLY SIGNIFICANT PDAS TREATMENT OF PULMONARY HYPERTENSION IN HS-PDA PATIENTS”, Journal of Pharmaceutical Negative Results, pp. 3266–3274, Dec. 2022, Accessed: Jun. 21, 2026. [Online]. Available: https://www.pnrjournal.com/index.php/home/article/view/4563