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The effect of PDT after acetic acid treatment. Cells were treated with various concentrations (0, 5, and 10 μM) of acetic acid for 24 h, and 20 μM Hematoporphyrin for 6 h. Cells were irradiated with the excimer dye laser light (635 nm, 1 J/cm2). Error bars indicate SD (n = 4). *p<0.05.
