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pulmonary hypertension interstitial lung disease inhaled prostacyclin prostacyclin lung functions pft pulmonary function test constrictive pericarditis igg4 disease mediastinal fibrosis ipf idiopathic pulmonary fibrosis endobronchial tumor due to tuberculosis tuberculosis endobronachial tb pulmonary vascular disease treatment of pulmonary hypertension cxr poph pleural effusion cteph treatment heart failure with normal ef heart failure in elderly diastolic heart failure diastolic dysfunction ccf congestive heart failure heart failure hooka shisha e-cigarette smoking tobacco chest x-ray sle sclerderma connective tissue disease acute chest syndrome sickle cell disease granulomatous lung disease pulmonary sarcoidosis sarcoidosis iloprost