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Cell Viability (CV, %) of (a) NIH-3T3, (b) HaCaT, and (c) SH-SY5Y cells treated with ■ 1.0 mg, and ■ 2.0 mg of SiO2-CGA hybrids, after 48 h exposure time by means of MTT test results. Values, reported as percentage vs. an untreated control, are the mean ± SD of measurements carried out on three samples (n = 3) analyzed six times.
