1. Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
2. Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
3. Division of Pulmonary and Critical Care Medicine, Intermountain Medical Center, Murray, Utah
4. University of Utah, Salt Lake City
5. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
6. Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
7. Division of Pulmonary and Critical Care Medicine, Department of Medicine, David Geffen School of Medicine at UCLA, Ronald Reagan–UCLA Medical Center, Los Angeles, California
8. Department of Surgery, Duke University, Durham, North Carolina
9. Department of Emergency Medicine, Massachusetts General Hospital, Boston
10. Section of Pulmonary, Critical Care, Allergy and Immunologic Disease, Department of Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
11. Department of Emergency Medicine, University of Colorado School of Medicine, Aurora
12. Division of Epidemiology and Population Health, Department of Medicine, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York
13. Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee
14. Department of Medicine, Massachusetts General Hospital, Boston
15. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Oregon Health and Science University School of Medicine, Portland
16. Department of Emergency Medicine and Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle
17. Cardiovascular Research Institute, Departments of Medicine and Anesthesia, University of California, San Francisco
18. Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora
19. Department of Surgery, University of Michigan, Ann Arbor
20. Department of Surgery, University of Washington, Seattle
21. Department of Emergency Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
22. Department of Medicine, University of Massachusetts Medical School-Baystate, Springfield
23. Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
24. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Massachusetts General Hospital, Boston