1 Department of Pulmonary and Critical Care Medicine, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio.
2 Department of Pulmonary and Critical Care Medicine, University Hospitals Cleveland Medical Center, Cleveland, Ohio.
3 Department of Pulmonary, Allergy, and Critical Care Medicine, Respiratory Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
4 Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland.
5 Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and.
6 Section of Interventional Pulmonology and Pulmonary Oncology, Division of Pulmonary and Critical Care Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.