Methods A randomized double-blind parallel controlled clinical trial was conducted.

方法本研究采用随机、双盲、平行对照的临床研究方法。

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Methods a multicenter, double-blind, randomized controlled trial was conducted.

方法用多中心随机双盲对照试验。

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DESIGN: a completely randomized, double blind controlled trial was conducted.

设计：完全随机双盲实验对照研究。

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It is because the government-funded trial was a placebo-controlled, double-blind, randomized controlled trial.

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