Patienterne havde moderat til svær (NYHA/ WHO - funktionsklasse I- IV) PAH som et resultat af idiopatisk PAH (IPAH, også betegnet primær pulmonal hypertension), bindevævssygdom (CTD) eller medfødt hjertesygdom (CHD).
Patients had moderate to severe (NYHA/ WHO functional class II-IV) pulmonary arterial hypertension resulting from idiopathic pulmonary arterial hypertension (IPAH, also known as primary pulmonary hypertension), connective tissue disease (CTD), or congenital heart disease (CHD).