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A Prospective, Open-label, Platform Study for Long-term Follow-up of Participants Using Study Intervention in Pulmonary Hypertension Parent Studies

A Phase 3, Prospective, Multicenter, Double-blind, Double-dummy, Randomized, Active-controlled, Parallel-group, Group-sequential, Adaptive, Event-driven Study to Compare Efficacy, Safety, and Tolerability of Macitentan 75 mg Versus Macitentan 10 mg in Patients with Pulmonary Arterial Hypertension, Followed by an Open-label Treatment Period With Macitentan 75 mg