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设计：这是一项随机对照的交叉试验。
Design: This was a randomized, controlled, crossover trial.
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临床试验中最常见的设计是平行组设计和交叉设计。
The most common designs in clinical trial are parallel design and cross over design.
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临床试验中最常见的设计是平行组设计和交叉设计。
The most common designs in clinical trial are parallel design and cross over design.
youdao