There was no significant difference in scope, efficacy of anesthesia and side effects.

麻醉范围、效果及不良反应差异亦无显著性。

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Treatment group and the length of the course of the comparison:in the treatment group compared efficacy of different length of the course there was no significant difference(P>0.05).

治疗组病程长短与疗效的比较：治疗组中不同病程长短疗效比较无显著性差异（P＞0.05）。

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