title: Clinical efficacy of sildenafil in primary pulmonary hypertension.
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Oudiz
authors.forename: Karlman
authors.initials: K
authors.lastname: Wasserman
mesh_terms: D005080:Exercise Test; D017079:Exercise Tolerance / Q000187:drug effects*; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D010879:Piperazines / Q000494:pharmacology* / Q000627:therapeutic use; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D014665:Vasodilator Agents / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D000068677:Sildenafil Citrate