1. Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan
2. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
3. Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
4. Division of Pulmonary and Critical Care Medicine, University of Washington, Seattle, Washington
5. Division of Pulmonary Disease and Critical Care Medicine, University of Vermont College of Medicine, Burlington, Vermont
6. Division of Oncology and
7. Division of Pulmonary and Critical Care Medicine, Johns Hopkins Hospital, Baltimore, Maryland
8. Department of Emergency Medicine and
9. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Hennepin County Medical Center, Minneapolis, Minnesota
10. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois; and
11. Division of Pulmonary and Critical Care, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts