randomized double-blind clinical trial 随机双盲临床试验
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。
METHODS: The parallel double blind randomized control clinical trial was used.
方法：采用平行双盲随机对照研究。
Methods: a randomized double-blind controlled clinical trial (RCT) was conducted.
方法：随机双肓对照临床试验(rct)。
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