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rector, Cystic Fibrosis Research Center Dr. Welsh39。Human cystic fibrosis airway epithelia have reduced Cl? conductance but not increased Na+ conductance Omar ,1, JengHuar Chena,b, Philip H. Karpa,b, Sarah Ernsta, Shaf Keshavjeec, Kalpaj Parekhd, Julia KlesneyTaita, Joseph Zabnera,2,and Michael ,b,e,2 Departments of aInternal Medicine,dCardiothoracic Surgery, and eMolecular Physiology and Biophysics and bThe Howard Hughes Medical Institute, The RoyJ, and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA52242。 and cToronto Lung Transplant Program, University of Toronto, Toronto, ON, Canada M5G 2C4 PNAS. 2022 Jun 21。s clinical interests include the diagnosis and therapy of lung disease, especially airway diseases. His research focuses in three main areas. First: Biology and pathogenesis of CF and new treatments. Second: Physiology and cell biology of airway epithelia. Third: Acid sensing ion channels in the central and peripheral nervous systems with an emphasis o