Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD. Electronic address: lyarmus@jhmi.edu. Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD. Section of Interventional Pulmonology, Division of Pulmonary and Critical Care Medicine, University of North Carolina School of Medicine, Chapel Hill, NC. Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD. Division of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD. Division of Radiation Oncology, Johns Hopkins University School of Medicine, Baltimore, MD. Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA. Mercator MedSystems, Inc., Emeryville, CA. Section of Interventional Pulmonology, Division of Pulmonary, Allergy and Critical Care Medicine, Duke University, Durham, NC.