1. From the Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, Birmingham (S.P.B.); LungenClinic Grosshansdorf and Christian Albrechts University of Kiel, Airway Research Center North, German Center for Lung Research, Grosshansdorf (K.F.R.), and the Department of Medicine, Pulmonary, and Critical Care Medicine, University of Marburg, German Center for Lung Research, Marburg (C.F.V.) — all in Germany; the Department of Medicine, Section on Pulmonary and Critical...