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Figure 2: Phase-contrast microscopic appearance of cultured vascular endothelial cell (VEC) exposed to various udenafi l concentrations. Confl uent cells incubated with (a) 0 μmol/l udenafi l, (b) 1 μmol/l udenafi l, (c) 10 μmol/l udenafi l, and (d) 100 μmol/l udenafi l for 24 h displayed dose-dependent cytopathic changes. In 1 mmol/l udenafi l (e), there were few adherent cells. Scale bars, 50 μm

Figure 2: Phase-contrast microscopic appearance of cultured vascular endothelial cell (VEC) exposed to various udenafi l concentrations. Confl uent cells incubated with (a) 0 μmol/l udenafi l, (b) 1 μmol/l udenafi l, (c) 10 μmol/l udenafi l, and (d) 100 μmol/l udenafi l for 24 h displayed dose-dependent cytopathic changes. In 1 mmol/l udenafi l (e), there were few adherent cells. Scale bars, 50 μm