1. From the Department of Internal Medicine I (J.D.W., D.F., P.G., G.E., J.B.), University of Würzburg, Würzburg, Germany; and the Division of Pulmonology, Allergy, Cystic Fibrosis, and Sleep, Department of Pediatrics (J.M.H.), and Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine (D.P.J.), Emory University, Atlanta, Georgia.