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Differences in the distribution of 5-HT-positive neurons in the RN and nerve fibres in the POA. (A, B) 5-HT-positive neurons in the Sham and OVX groups. The black arrows show the positions where apparent differences were observed. Scale bars, 1 mm and 250 μm. (C, D) 5-HT-positive nerve fibres of POA in the Sham and OVX groups. Scale bars, 500 μm and 100 μm.
