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Effects of ovariectomy (Ovx) and three doses of vitamin E: low dose (LD, 300 mg/kg diet), medium dose (MD, 525 mg/kg diet), and high dose (HD, 750 mg/kg diet) on biomechanical parameters, (a) ultimate and yield load and (b) ultimate and yield stress of L4 vertebrae. Values are expressed as means ± S.E.M. Values that share the same superscript letters are not significantly (P ≥ .05) different; n = 12 rats/group.
