Epithelial Barriers (IMAGE) University of Zurich Caption Straight and clear epithelial barrier of healthy bronchial epithelial cells (at the top) and leaky and damaged asthmatic epithelial cells (at the bottom). Credit (Image: Cezmi Akdis) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.