| Institution: | 1. The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts, USA;2. Pulmonary Hypertension Center, University of Colorado, Denver, Colorado, USA;3. The Cardiovascular Institute, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA;4. Pulmonary Hypertension Center, Intermountain Medical Center and the University of Utah School of Medicine, Salt Lake City, Utah, USA;5. Mayo Clinic, Rochester, Minnesota, USA;6. Actelion Pharmaceuticals US, Inc., South San Francisco, California, USA;g. Houston Methodist Hospital Lung Center, Weill Cornell Medical College, Houston, Texas, USA |
