Hypertension, Pulmonary

• Department of Pulmonary Circulation, Thromboembolic Diseases and Cardiology, Centre of Postgraduate Education Medical, European Health Centre Otwock — Warsaw, Poland

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Arizona Pulmonary Specialists — Phoenix, Arizona, United States
• University of Colorado Health Science Center — Aurora, Colorado, United States
• University of Connecticut Health Center — Farmington, Connecticut, United States

• Odense University Hospital — Odense, Denmark

• David Geffen School of Medicine, UCLA — Los Angeles, California, United States

Not specified

• GSK Investigational Site — Cambridge, Cambridgeshire, United Kingdom

• National Heart Centre Singapore — Singapore

• Royal Papworth Hospital NHS Foundation Trust — Cambridge, United Kingdom

• Thoraxklinik am Universitätsklinikum Heidelberg in cooperation with Nierenzentrum Heidelberg — Heidelberg, Baden-Wurttemberg, Germany
• Universitätsmedizin Greifswald, Zentrum für Innere Medizin, Klinik und Poliklinik für Innere Medizin B — Greifswald, Mecklenburg-Vorpommern, Germany
• Herzzentrum der Universität zu Köln, Klinik III für Innere Medizin und Zentrum für Molekulare Medizin — Cologne, North Rhine-Westphalia, Germany
• Deutsches Herzzentrum Berlin, Klinik für Herz-, Thorax- und Gefäßchirurgie — Berlin, Germany

• UT Southwestern Medical Center — Dallas, Texas, United States