Hypertension

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

• Khon Kaen Unversity — Khon Kaen, Thailand

• 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

• Investigative Site — Paris, France
• Investigative Site — Budapest, Hungary
• Investigative Site — Bucharest, Romania
• Investigative Site — Bratislava, Slovakia

• National Heart Centre Singapore — Singapore

• Division of Endocrinology, Diabetology and Metabolism; University of Turin — Turin, Piedmont, Italy