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1·Study Design. Randomized controlled trial.

研究设计：随机对照试验。

2·Study Design. A randomized controlled trial.

研究设计：随机对照试验。

3·METHODS: a randomized controlled trial was adopted.

方法：采用随机对照试验。

4·DESIGN: Examiner blinded non randomized controlled trial.

设计：单盲非随机的对照试验。

5·Study Design. A prospective, randomized controlled trial.

前瞻性的随机对照研究。

6·Method: Randomized controlled trial and animal model were applied.

方法：采用随机对照、动物造模的方法。

7·Methods a multicenter, double-blind, randomized controlled trial was conducted.

方法用多中心随机双盲对照试验。

8·A randomized controlled trial of preventive antibiotics used for esophageal operations.

食管手术预防性抗生素使用的随机对照研究。

9·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。

10·They conducted a randomized controlled trial of 18-55 year olds with moderately severe low back.

他们对18 - 55岁中重度腰背部疼痛的患者进行了一项随机对照研究。