Qualitative Research to Explore Treatment Preference in Pulmonary Arterial Hypertension (PAH) Subjects

All interview questions are designed to be very open-ended in order to ascertain subjects' preferences in an un-biased manner (as possible), with additional probes only being used when necessary to ensure all concepts of interest are covered. Subjects will be asked a series of broad, open-ended questions designed to encourage them to talk openly and as spontaneously as possible about their experience of taking oral treatment(s) for their PAH.