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Cell viability of human primary renal proximal tubule epithelial cells. The cells were treated with colistin, AgNPs (F0), and Col-AgNPs (F3) for 24 h before determining cell viability by MTT assay. Non-treatment cells were used as the control. * and ** indicated a significant difference at p-value < 0.05 when compared to non-treatment and samples at the same concentration, respectively.
