Fig. 3From: Effect of sub-chronic exposure to cigarette smoke, electronic cigarette and waterpipe on human lung epithelial barrier functionCell velocity analysis using time-lapse video of epithelial cell monolayer exposed to CS or EC aerosol. We did not measure cell motility in cells exposed to TW. Values show mean ± SD. *, significant changes in relation to control air. Donors: donor 1, filled circles (•); donor 2, empty squares (□); donor 3, empty circles (ο)Back to article page