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Photomicrographs of the histological structure of arterioles (arrowheads) within the anterior circulation of the circle of Willis. Samples obtained from the (A) control, (B) gymnemic control, (C) STZ, (D) STZ + gymnemic acid and (E) STZ + glibenclamide groups were subjected to Masson's trichrome staining; magnification, x100. STZ, streptozotocin.
