1. Cardiovascular Research Foundation, New York, NY, USA
2. Sahlgrenska University Hospital, Gothenburg, Sweden
3. Vanderbilt University Medical Center, Nashville, TN, USA
4. NewYork-Presbyterian Hospital/Columbia University Medical Center, New York, NY, USA
5. Hôpital du Sacré-Coeur de Montréal, Montréal, Québec, Canada
6. Pulmonary Hypertension and Vascular Biology Research Group, Institut Universitaire de Cardiologie et de Pneumologie de Québec, Laval University, Québec, Québec, Canada
7. Gagnon Cardiovascular Institute, Morristown Medical Center, Morristown, NJ, USA