“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) 2022. Journal of Pharmaceutical Negative Results, December, 3266-74. https://doi.org/10.47750/pnr.2022.13.S08.401.