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Melatonin or probiotics treatment alleviated hematopoietic damage in NP exposure mice (n = 3). (a) Distribution of 80 nm PS-NP in the bone marrow of mice. (b) Histopathological analysis of the femur. (c)–(f) Measurement of markers of hematopoietic damage by flow cytometry. *p < 0.05, **p < 0.01, ***p < 0.001, ns: p > 0.05.
