方法：随机双盲双模拟对照研究。

METHODS: Randomized double blind control clinical trial was used.

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方法：采用随机、双盲双模拟、平行对照方法。

METHODS: It was a randomized, double blind, double model, parallel controlled clinical trial.

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方法用随机化、双盲、双模拟、多中心、阳性药平行对照研究方法。

Methods This is a randomized, double blind, double-dummy, multi-center, parallel positive controlled clinical study.

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