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Blood serum lactate dehydrogenase (LDH) activity in mice with LLC following NP administration. LDH activity was assessed in serum of mice on day 18 after tumor cell inoculation and after daily intra-peritoneal injections of NPs for 12 days at a dose 500 μg/kg/day. Values marked with different letters (a, b, c, d) are statistically different, P < 0.05. All values are given as the mean ± 1 S.D., n = 5 for each group
