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. 2017 Jul 14;7(3):692–701. doi: 10.1177/2045893217721903

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Fig. 1. — Creation of the study population. The present study was a retrospective observational cohort study of patients with PAH from two centers. Diagnosis of PAH confirmed by right heart catheterization based on a mPAP ≥ 25 mmHg, and a mean PAWP ≤ 15 mmHg. BWH, Brigham and Women’s Hospital; HULP, Hospital Universitario La Paz; PAH, pulmonary arterial hypertension; PH, pulmonary hypertension.