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. Published online December 11, 2022:3266-3274. doi:10.47750/pnr.2022.13.S08.401