Global Pulmonary Arterial Hypertension Market Size, Share & Trends Analysis Report, By Drug Class (Endothelin Receptor Antagonists (ERAs), PDE-5 Inhibitors, Prostacyclin and Prostacyclin Analogs, SGC Stimulators), By Type (Branded, Generics), By Route of Administration (Oral, Intravenous/ subcutaneous, Inhalational) and By Region, And Segment Forecasts, Till – 2030