1. Division of Pulmonary Critical Care & Sleep Medicine Houston Methodist Hospital Houston Texas USA
2. Division of Pulmonary & Critical Care Medicine UCSF Fresno Fresno California USA
3. Spectrum Health Grand Rapids Michigan USA
4. Poms Research Consultants Chapel Hill North Carolina USA
5. Division of Cardiology A. Cardarelli Hospital Naples Italy
6. Respiratory Institute Cleveland Clinic Ohio USA
7. Division of Pulmonary & Critical Care Medicine University of Cincinnati College of Medicine Cincinnnati Ohio
8. Division of Pulmonary & Critical Care Medicine University of Texas Health Science Center at San Antonio San Antonio Texas USA
9. Division of Pulmonary & Critical Care Medicine Warren Alpert Medical School of Brown University Providence Rhode Island USA
10. Division of Pulmonary & Critical Care Medicine University of New Mexico Health Science Center Albuquerque New Mexico USA
11. Division of Pulmonary & Critical Care Medicine John Hopkins University Baltimore Maryland USA
12. Division of Pulmonary & Critical Care Medicine University of Tennessee Medical Center Knoxville Tennessee USA
13. Pulmonary Hypertension Program, Inova Fairfax Hospital Fairfax Virginia USA