1. Department of Environmental and Occupational Health Sciences University of Washington Seattle WA USA
2. Presbyterian Hospital Columbia University Medical Center New York NY USA
3. Department of Medicine UCLA School of Medicine Los Angeles CA USA
4. Division of Pulmonary and Critical Care Medicine University of Michigan Ann Arbor MI USA
5. Division of Respiratory, Critical Care, and Occupational Pulmonary Medicine, Department of Medicine University of Utah Health Sciences Center Salt Lake City UT USA
6. Environmental Health and Engineering Johns Hopkins University Baltimore MD USA
7. Section on Pulmonary, Critical Care, Allergy and Immunologic Diseases, Department of Internal Medicine Wake Forest School of Medicine Winston‐Salem NC USA
8. Division of Pulmonary Medicine University Of Utah Hospital Salt Lake City UT USA
9. Pulmonary/Critical Care Dartmouth Hitchcock Medical Center Lebanon NH USA
10. University of Utah Hospital Salt Lake City UT USA
11. Department of Medicine Johns Hopkins University Baltimore MD USA
12. Department of Medicine University of Washington Seattle WA USA
13. Department of Epidemiology University of Washington Seattle WA USA