Anjali Vaidya, MD, FACC, FASE, FACP, Co-Director of the Pulmonary Hypertension, Right Heart Failure & Chronic Thromboembolic Pulmonary Hypertension (CTEPH) Program at Temple University Hospital, provided perspective to Medscape on a new phase 3 study comparing mono and duo therapies for guidance and treatment options for children with pulmonary arterial hypertension (PAH). Dr. Vaidya was not involved in the study.