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PEE-provoked human T24 cell apoptosis. Apoptotic effect was observed by treating human T24 cells with 50 or 100 μg/ml of PEE for the indicated time periods and the effect was measured by the annexin V/PI staining as described in section 2. The representative data was posted in (A) and the mean ± S.D. of three independent experiments was demonstrated in (B).
