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Changes in the mast cells in the 8-week Sham and OVX rats (Toluidine Blue stain, 10 × 40). (a) Few mast cells (arrowheads) were observed in the bone marrow in Sham rats, and those observed were scattered in the marrow; (b) the mast cells (arrowheads) were increased in number as well as in granularity in the OVX rat marrow.
