1. University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
2. Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
3. Medical University of South Carolina, Charleston
4. National Institute for Health Research Unit, Royal Brompton and Harefield NHS Foundation Trust, Imperial College, London, England5Chelsea and Westminster Hospital, London, England
5. New York University School of Medicine, New York, New York
6. Pulmonary, Critical Care, and Sleep Medicine, Houston, Texas
7. University Hospital of Reims, INSERM U903, Reims, France
8. OSF HealthCare–Illinois Lung and Critical Care Institute, Peoria
9. Quebec Heart and Lung Institute, Quebec City, Quebec, Canada
10. University Nice Sophia Antipolis, IRCAN, ONCOAGE, Nice, France
11. Palo Alto Medical Foundation/El Camino Hospital, Mountain View, California
12. Northwestern University, Chicago, Illinois
13. University of Wisconsin School of Medicine, Madison
14. University of Florida, Gainesville
15. Mayo Clinic, Rochester, Minnesota
16. Cedars-Sinai Medical Center, Los Angeles, California
17. Beth Israel Deaconess Medical Center, Boston, Massachusetts
18. Franciscan Research Center, Tacoma, Washington
19. University of Michigan, Ann Arbor
20. University of Alabama at Birmingham, Birmingham
21. University of Texas, San Antonio
22. New York Presbyterian Hospital/Columbia University, New York, New York
23. Thoraxklinik at the University of Heidelberg, Heidelberg, Germany
24. Duke University Medical Center, Durham, North Carolina
25. Cleveland Clinic Foundation, Cleveland, Ohio
26. University of Groningen, University Medical Center Groningen, Groningen, the Netherlands