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Representative photomicrographs of hippocampal neurons in sham-operated C3H/HeN mice (a) and cardiopulmonary resuscitation treated C3H/HeN mice (b) and sham operated C3H/HeJ mice (c) and cardiopulmonary resuscitation treated C3H/HeJ mice (d) (n = 4, per group). The black arrow indicates neuronal vacuolar change and dark pyknotic nuclei. *P < 0.01 versus sham group; †P < 0.05 versus C3H/HeN cardiopulmonary resuscitation group; H and E, original magnification: ×400.
