Randomized controlled trials carry more weight.
随机对照试验更有信服力。
In controlled trials, 484 were base line comparable.
对照研究中，试验前进行过均衡性检验者484篇。
Method: Use the method of randomized controlled trials.
方法：采用随机对照试验的方法。
Study Design. A systematic review of randomized controlled trials.
研究设计：随机对照试验的系统评价。
Good quality controlled trials are needed to answer this question.
要回答这个问题，需要品质好的对照性的试验。
There is an urgent need for further large randomised controlled trials with long-term follow-up.
急需进一步有长期追踪的随机对照试验。
There is an urgent need for further large randomised controlled trials with long-term follow-up.
急需进一步有长期追踪的随机对照试验。
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