Derek van Amerongen, MD, MS, FACOG: In terms of prescribing medications, especially in complex situations such as PH [pulmonary hypertension] and PAH [pulmonary arterial hypertension], we have never ...

Hilary M. DuBrock, MD: There’s significant geographic and center-to-center variability around which a specialist—a pulmonologist or a cardiologist—would be more likely to make an initial ...