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Effect of macitentan on morbidity or mortality as a first event in patients receiving background therapy [5]. The hazard ratio for macitentan vs. placebo was 0.62 (95% CL 0.43–0.89; log-rank p value 0.009). The Kaplan–Meier curves are displayed up to 36 months. The analysis (conducted on the all-randomized set) takes into account all available data
