1. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Spectrum Health, Grand Rapids, MI, USA
2. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
3. Division of Pulmonary and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
4. Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington, KY, USA
5. Division of Pulmonary and Critical Care Medicine, WellStar Medical Group, Smyrna, GA, USA
6. Division of Pulmonary, Critical Care, and Sleep Medicine, Suburban Lung Associates in Elk Grove, IL, USA
7. Division of Pulmonary, Critical Care, Allergy, and Occupational Medicine, Indiana University, Indianapolis, IN, USA
8. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Cincinnati, Cincinnati, OH, USA