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Cytotoxicity of the combination of MPPa and light (i.e., PDT) on A549 (A), A549/DDP (B), SKOV3 (C), and SKOV3/DDP (D) cells. Based on the cell-survival curve, 2.4 J/cm2 light and 2.0 μM MPPa were employed to perform PDT. Data were mean ± standard deviation for 3 independent experiments.
