Methods: a multicenter, randomized, double blind, and placebo controlled clinical study was performed.

方法本次为一中心，随机，双盲，安慰剂对照临床观察。

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

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。

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The Harvard study falls short of the research 'gold standard', however, because the women reported their aspirin use in questionnaires, rather than going through a controlled clinical trial.

然而，哈佛的这项研究并不符合研究的“黄金标准”，因为妇女是以调查问卷的方式报告她们阿司匹林的服用情况，而不是通过一个可控制的临床试验。

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Packer says this is the first placebo-controlled study in acute heart failure to show a clinical benefit.

FORBES: Open Questions For Heart Failure Drugs

For one, the groups noted the analysis is a retrospective study, not a prospective, randomized controlled clinical trial, which many regard as a gold standard for ferreting out safety concerns.

FORBES: The Confusion Over A Pair Of Diabetes Drugs And Pancreatitis