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Time course of the changes induced by the sham (EA sham) or real electroacupuncture (EA). Anesthesia was provided during the time indicated by a horizontal dashed arrow. EA was applied for 20 min (solid line) using the needle types numbered as in A. Points are means (± SD) of six rats per group. P < 0.05 compared to sham EA (*), sham EA, EA (I) and EA (V) (+), or any other group (#), using the Bonferroni post hoc test.
