About the Cover
Cover picture: Airway surface liquid (ASL) osmolality measured in monolayer cultures of airway epithelial cells. (top) Cells grown on porous filters at an air-liquid interface are mounted in a perfusion chamber in a 100% humidity tent and stained with osmolality-sensitive fluorescent liposomes. (bottom) Liposome-stained ASL images obtained using calcein (green) and SR (red) filters, with pseudocolored ratio image and osmolality scale. See related article by Jayaraman, S., Y. Song, and A.S. Verkman in this issue, pp. 423430.
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