1. UCSF, Division of Pulmonary and Critical Care Medicine, Department of Medicine and CVRI, San Francisco, California, United States;
2. University of California San Francisco, 8785, Epidemiology & Biostatistics, San Francisco, California, United States
3. Johns Hopkins University, Medicine, Baltimore, Maryland, United States
4. Wake Forest School of Medicine, Center for Genomics and Personalized Medicine Research, Winston-Salem, North Carolina, United States
5. University of California Los Angeles David Geffen School of Medicine, 12222, Medicine, Los Angeles, New York, United States
6. Columbia University, New York, New York, United States
7. National Jewish Medical and Research Center, Department of Medicine, Denver, Colorado, United States
8. University of Iowa, 4083, Internal Medicine, Iowa City, Iowa, United States
9. Harbor-UCLA Medical Center, Torrance, California, United States
10. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States
11. Temple University Hospital, Pulm & Crit Care Medicine, Philadelphia, Pennsylvania, United States
12. University of Michigan, 1259, Ann Arbor, Michigan, United States
13. University of Alabama at Birmingham and the Birmingham VA Medical Center, Medicine/Pulmonary, Allergy and Critical Care, Birmingham, Alabama, United States
14. Johns Hopkins, 1466, Baltimore, Maryland, United States
15. University of Michigan, Internal Medicine, Ann Arbor, Michigan, United States
16. University of Iowa Carver College of Medicine, Radiology, Iowa City, Iowa, United States
17. Weill Cornell Medical College, Pulmonary and Critical Care Medicine, New York, New York, United States
18. University of Illinois at Chicago, 14681, Chicago, Illinois, United States
19. Medical Expert at GlaxoSmithKline, Lexington, Kentucky, United States
20. University of Ketucky, Epidemiology , Lexington, Kentucky, United States
21. University of Utah, Salt Lake City, Utah, United States
22. University of Alabama at Birmingham, Pulmonary, Allergy and Critical Care Medicine, Birmingham, Alabama, United States
23. Wake Forest School of Medicine Medical Center, Section on Pulmonary, Critical Care, Allergy & Immunological Diseases, Wake Forest, North Carolina, United States
24. Johns Hopkins University School of Medicine, Pulmonary and Critical Care Medicine, Baltimore, Maryland, United States
25. University of Nebraska, Omaha, Nebraska, United States
26. University of California, San Francisco, Medicine, San Francisco, California, United States
27. UCSF, Division of Pulmonary and Critical Care Medicine, Department of Medicine and CVRI, San Francisco, California, United States