Affiliation: | 1. Division of Pulmonary and Critical Care, Department of Medicine, University of Vermont College of Medicine, 149 Beaumont Avenue, HSRF 222, Burlington, VT 05405, USA;2. Division of Pulmonary and Critical Care, Department of Medicine, University of Vermont College of Medicine, 149 Beaumont Avenue, HSRF 230, Burlington, VT 05405, USA;3. University of Giessen Lung Center (UGLC), Medical Clinic II, Justus-Liebig-University, Klinikstr 36, D-35392, Giessen, Germany |