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Damage to the ultrastructure of neuronal mitochondria in the animals exposed to Fe2O3 nanoparticles and controls by brain regions: (a) basal ganglia and (b) olfactory bulb. Notes: values are given as the arithmetic mean of the percentage of mitochondria in the total number of detected neuronal mitochondria; * p < 0.05 (Mann–Whitney U test) compared with the controls.
