Pulmonary Arterial Hypertension

• Harbor-UCLA Medical Center — Torrance, California, United States
• Allegheny General Hospital — Pittsburgh, Pennsylvania, United States
• UTSW Medical Center Dallas — Dallas, Texas, United States
• Universite Libre de Bruxelles — Brussels, Belgium

• University of Pennsylvania — Philadelphia, Pennsylvania, United States

• Children's Hospital of Colorado — Aurora, Colorado, United States
• Children's Heathcare of Atlanta, Inc. at Egleston — Atlanta, Georgia, United States
• Riley Hospital for Children — Indianapolis, Indiana, United States
• Nationwide Children's Hospital — Columbus, Ohio, United States

• The Ohio State University Wexner Medical Center — Columbus, Ohio, United States
• Allegheny General Hospital — Pittsburgh, Pennsylvania, United States

• Harbor-UCLA Medical Center — Torrance, California, United States
• Midwest Heart Foundation - Advocate Medical Group — Oakbrook Terrace, Illinois, United States
• Beth Israel Medical Center — New York, United States
• Albert Einstein College of Medicine — The Bronx, New York, United States

• University Medical Center Groningen — Groningen, Netherlands

• Dr Martin Johnson — Glasgow, United Kingdom

Not specified

• Vanderbilt Univeristy — Nashville, Tennessee, United States

• Novartis Investigative Site — Sendai, Miyagi, Japan
• Novartis Investigative Site — Bunkyo-ku, Tokyo, Japan
• Novartis Investigative Site — Mitaka, Tokyo, Japan