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APH to evaluate the cytotoxicity of the curcumin-based oral gel at various concentrations on (A) HOKs, (B) OKF6, (C) DOKs, and (D) PE/CA-PJ15. Data are presented as means and 95% confidence intervals (95% CI). Statistical significance is represented as follows: * p < 0.05, ** p < 0.002, *** p < 0.0005, **** p < 0.0001.
