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英语翻译The published literature was scanned by formal searches

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英语翻译
The published literature was scanned by formal searches of electronic databases up to January 2010.RCTs were eligible for inclusion if they compared atorvastatin versus placebo treatment in patients with CHF and reported the clinical outcomes.
英语翻译The published literature was scanned by formal searches
这应该是作者描述自己在做这篇文章时所做的数据调查工作.
对截至2010年1月以前被正规电子数据库检索收录的全部出版文献进行浏览.
选取了具有如下条件的文献:
采取了临床随机对照试验,分别使用阿托伐他丁治疗与安慰剂治疗(即0剂量)作为对照,对充血性心力衰竭患者的疗效进行试验,并且对临床结果做出试验报告的文献.