1. Division of Allergy and Infectious Diseases, University of Washington, Seattle
2. Pulmonary and Critical Care Division, University of Vermont College of Medicine, Burlington
3. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
4. Critical Care Division, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
5. Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor
6. Division of Pulmonary, Critical Care and Sleep Medicine, Ohio State University Wexner Medical Center, Columbus
7. Department of Pulmonary and Critical Care Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
8. Division of Pulmonary, Critical Care and Sleep Medicine, National Jewish Sleep Center, Denver, Colorado
9. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia
10. Department of Critical Care Medicine, Cleveland Clinic, Cleveland, Ohio
11. Department of Medicine, University of Virginia, Charlottesville
12. Division of Critical Care Pulmonary Medicine, Baystate Medical Center, Springfield, Massachusetts
13. Department of Surgery, University of Washington, Seattle
14. Division of Pulmonary and Critical Care, Northwestern Feinberg School of Medicine, Chicago, Illinois
15. Division of Pulmonary and Critical Care Medicine, Oregon Clinic, Portland
16. Interdepartmental Division of Critical Care Medicine, Sunnybrook Health Sciences Center, Toronto, Ontario, Canada
17. Division of Allergy and Infectious Diseases, University of Washington, Seattle3Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington