Methods: A randomized, placebo contmlled, double blind trial was used.

方法：采用随机双盲、平行对照临床试验方法。

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Coenzyme Q10 decreases all cause mortality byhalf, according to the results of a multicentre randomised double blind trial presented today at Heart Failure 2013 congress.

根据今天在心衰2013会议上公布的多中心随机双盲实验的结果，辅酶Q10减低一半所有原因的死亡率。

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In a double-blind trial, there were some improvements.

在一个双盲测试中，有了一些进步。

《柯林斯英汉双解大词典》

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

FORBES

In the double-blind, randomized control trial, half the women got tenofovir gel and half got a placebo.

CNN: Gel cuts HIV transmission rate in study

And in a study published last year, researchers in Australia showed in a double-blind, placebo-controlled trial that subjects with suspected gluten sensitivity had substantially fewer symptoms on a gluten-free diet than control subjects who unknowingly ingested gluten.

WSJ: New Guide to Who Really Shouldn't Eat Gluten