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