Search results: DC.title:Study AND DC.title:of AND DC.title:the AND DC.title:effects AND DC.title:of AND DC.title:Riociguat, AND DC.title:Sildenafil, AND DC.title:and AND DC.title:Bay AND DC.title:60-2770 AND DC.title:upon AND DC.title:endothelial AND DC.title:function AND DC.title:in AND DC.title:patients AND DC.title:with AND DC.title:Chronic AND DC.title:Thromboembolic AND DC.title:Pulmonary AND DC.title:Hypertension