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Viability of (a) Leydic cells and (b) Sertoli cells treated with ZnO NPs of various concentrations for 12 and 24 h as determined with MTT cell proliferation assay. LDH leakage level of (c) Leydic cells and (d) Sertoli cells. Data are presented as mean ± standard deviation of three separate experiments, in triplicate. ** p < 0.01. Reproduced from [143] under the Creative Commons Attribution—Non Commercial (unported, v3.0) license.
