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The effect of acupuncture on cyclic guanosine monophosphate (cGMP) and nitric oxide (NO) in the rat hippocampus and plasma measured by enzyme-linked immunoassay (ELISA). (A) cGMP in the rat hippocampus. (B) cGMP in rat plasma. (C) NO in the rat hippocampus. (D) NO in rat plasma. The results were quantified by ELISA in the hippocampus and plasma. * Mean significant difference vs. the control (P<0.05). #, ## Mean significant difference vs. the model (P<0.05).
