1 Department of Pulmonary, Allergy, and Critical Care Medicine, Penn State Milton S. Hershey Medical Center, Penn State College of Medicine, Hershey, PA.
2 Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine (Drs Feller-Kopman and Yarmus), Johns Hopkins University School of Medicine, Baltimore, MD.
3 Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine (Drs Feller-Kopman and Yarmus), Johns Hopkins University School of Medicine, Baltimore, MD. Electronic address: lyarmus@jhmi.edu.