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Photomicrograph of the tissue sections from SNpc that have been incubated with anti-TH antibody in different groups. a: control group, b: normal saline group, c: TiO2-10 group, d: TiO2-25 group, e: TiO2-50. 20X, Olympus BX51, Japan, Scale bar= 200 µm. Arrows show TH+ neurons
