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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。
youdao
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Methods:this was a randomized, double blind controlled trial.
方法：采用随机双盲对照研究。
youdao
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Methods:this was a randomized, double blind controlled trial.
方法：采用随机双盲对照研究。
youdao