The results were reported as the mean ± SD of three independent measurements; the IC50 values were calculated by linear regression analysis, and independent-sample T-tests were performed to compare the different groups [104 (link)]. A p value of less than 0.05 was considered statistically significant. The statistical analyses were performed using the SPSS software 17.0 (SPSS Inc., Chicago, IL, USA) for windows. All of the linear regression analyses described in this paper were processed using version 6.0 of the Origin professional software (OriginLab Corporation, Northampton, MA, USA).
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