Fig. 1From: Tiotropium/Olodaterol treatment reduces cigarette smoke extract-induced cell death in BEAS-2B bronchial epithelial cellsEffects of cigarette smoke extraction (CSE) on the viability of BEAS-2B cells. Cell viability of BEAS-2B cells after treatment with various concentrations of CSE for 24 h. Cell viability was determined using the MTT assay. The absorbance of the reaction solution at 570 nm was recorded. Data are presented as means ± SD from triplicate samples for each treatment. *P < 0.05 versus DMSO-treated controlBack to article page