The Efficacy and Safety of Sildenafil Citrate Used in Combination With Intravenous Epoprostenol in PAH

Pfizer Investigational Site, Copenhagen

Pfizer Investigational Site, Leuven

Pfizer Investigational Site, New York

Pfizer Investigational Site, Pittsburgh

Pfizer Investigational Site, Baltimore

Pfizer Investigational Site, Durham

Pfizer Investigational Site, Madrid

Pfizer Investigational Site, Nashville

Pfizer Investigational Site, Grenoble

Pfizer Investigational Site, Bologna

Pfizer Investigational Site, Cleveland

Pfizer Investigational Site, Cincinnati

Pfizer Investigational Site, Ann Arbor

Pfizer Investigational Site, Petah Tikva

Pfizer Investigational Site, Milwaukee

Pfizer Investigational Site, Milwaukee

Pfizer Investigational Site, Milwaukee

Pfizer Investigational Site, Rochester

Pfizer Investigational Site, Chicago

Pfizer Investigational Site, St Louis

Pfizer Investigational Site, Kansas City

Pfizer Investigational Site, Omaha

Pfizer Investigational Site, New Orleans

Pfizer Investigational Site, Houston

Pfizer Investigational Site, Denver

Pfizer Investigational Site, Denver

Pfizer Investigational Site, Salt Lake City

Pfizer Investigational Site, Los Angeles

Pfizer Investigational Site, Los Angeles

Pfizer Investigational Site, Torrance

Pfizer Investigational Site, Torrance

Pfizer Investigational Site, La Jolla

Pfizer Investigational Site, San Diego

Pfizer Investigational Site, Clamart

Pfizer Investigational Site, Boston

Pfizer Investigational Site, Boston

Pfizer Investigational Site, Omaha

Pfizer Investigational Site, Cincinnati

Pfizer Investigational Site, Providence

Pfizer Investigational Site, Nashville

Pfizer Investigational Site, Edmonton

Pfizer Investigational Site, Ottawa

Pfizer Investigational Site, Ottawa

Pfizer Investigational Site, Toronto

Pfizer Investigational Site, Montreal

Pfizer Investigational Site, Prague

Pfizer Investigational Site, Vandœuvre-lès-Nancy

Pfizer Investigational Site, Amsterdam

Pfizer Investigational Site, Nieuwegein

Pfizer Investigational Site, Barcelona

Pfizer Investigational Site, Papworth Everard

Pfizer Investigational Site, Glasgow