The lack of other randomized trials is unfortunate.
缺少其它随机性研究是不幸的。
Future randomized trials are warranted to confirm the survival benefit of this strategy.
有待进一步的随机试验来明确这一策略的生存受益。
Randomized controlled trials carry more weight.
随机对照试验更有信服力。
Study Design. A systematic review of randomized controlled trials.
研究设计：随机对照试验的系统评价。
Method: Use the method of randomized controlled trials.
方法：采用随机对照试验的方法。
Method: Use the method of randomized controlled trials.
方法：采用随机对照试验的方法。
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