1. Marsico Lung Institute/Cystic Fibrosis Research Center and
2. Department of Cell Biology, School of Medicine, Duke University, Durham, North Carolina;
3. Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California;
4. Center for Gastrointestinal Biology and Disease, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
5. Clinical Research Branch, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Chapel Hill, North Carolina;
6. Center for Respiratory Disease, National Hospital Organization Tokyo Hospital, Kiyose, Tokyo, Japan; and
7. Department of Respiratory Medicine, The University of Tokyo, Tokyo, Japan