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Photomicrographs of the liver from male Sprague-Dawley rats. There were no observable histological lesions in the sinusoids and central vein. Keys: (a): control, (b): 5000 mg/kg bwt, (c): 1000 mg/kg bwt, (d): 200 mg/kg bwt, (e): 80 mg/kg bwt, and (f): 40 mg/kg bwt.
