Study Design: Randomized controlled trial; Level of evidence, 1.

研究设计: 随机对照试验; 证据水平, 1.

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Study Design: Cost of illness study alongside a randomized controlled trial.

研究设计: 疾病成本研究及随机对照试验.

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Study Design . A randomized controlled trial with multivariable analyses of prognostic factors.

研究设计:预后因素多变量分析的随机对照试验.

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Study Design . Randomized controlled trial.

研究设计:随机对照试验.

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Study Design. A randomized controlled trial.

研究设计: 一项随机对照试验.

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Study Design. Cluster randomized controlled trial.

研究设计:一组随机控制试验.

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