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The effect of 2 Hz electroacupuncture on the ratio of CD4+ and CD8+ of splenic T lymphocyte in morphine dependent and withdrawal mice. Data were shown as means ± S.E, and analyzed with one-way ANOVA followed by Newman-Keuls posttest. ***P < .001 versus NS group; ### P < .001 versus MOR group; ▴▴▴ P < .001 versus MOR NW and restraint group. n = 6–8.
