1. From the Center for Lung Biology (S.L.S., J.K., H.C., J.V.W., T.S.) and the Departments of Pharmacology (S.L.S., H.C., T.S.), Pathology (J.K.), and Medicine (J.V.W.), University of South Alabama College of Medicine, Mobile, Ala; and the Department of Microbiology and Molecular Genetics (D.W.F.), Medical College of Wisconsin, Milwaukee, Wis.