1. Pulmonary, Allergy, Critical Care, and Sleep Medicine, Medical University of South Carolina, Charleston, South Carolina, USA.
2. Biostatistics and Bioinformatics, Emory University Rollins School of Public Health, Atlanta, Georgia, USA.
3. Infectious Disease, Emory University School of Medicine, Atlanta, Georgia, USA.
4. Epidemiology, University of Colorado, Anschutz Medical Campus, Johns Hopkins Bloomberg School of Public Health, Aurora, Colorado, USA.
5. Pulmonary, Allergy, Critical Care and Sleep Medicine, Minneapolis VA Health Care System, Minneapolis, Minnesota, USA.
6. Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Minnesota School of Medicine, Minneapolis, Minnesota, USA.
7. Infectious Disease, UCLA-Harbor Medical Center, Los Angeles, California, USA.
8. Pulmonary and Critical Care, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
9. Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
10. Pulmonary Diseases and Critical Care Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
11. Pulmonary Disease, University of Utah, Salt Lake City, Utah, USA.
12. Infectious Disease and Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
13. Infectious Disease, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
14. Pulmonary Medicine, Department of Veterans Affairs, Atlanta, Georgia, USA.
15. Division of Pulmonary, Allergy, Critical Care and Sleep, Department of Medicine, Emory University, Atlanta, Georgia, USA.