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McMahan, Zsuzsanna; Schönhoff, Florian; Van Eyk, Jennifer E; Wigley, Fredrick M; Hummers, Laura K (2015). Biomarkers of pulmonary hypertension in patients with scleroderma: a case-control study. Arthritis research & therapy, 17(1), p. 201. BioMed Central 10.1186/s13075-015-0712-4