1、Methods The random clinical study with double blind was used.
方法采取隨機雙盲對照臨床研究。

2、Methods:this was a randomized, double blind controlled trial.
方法：采用隨機雙盲對照研究。

3、DESIGN: a completely randomized, double blind controlled trial was conducted.
設計：完全隨機雙盲實驗對照研究。

4、Methods: Randomized double blind study was employed.
方法：隨機雙盲對照臨床研究。

5、METHODS: The parallel double blind randomized control clinical trial was used.
方法：采用平行雙盲隨機對照研究。

6、Methods: Random, double blind and double central prospective study was adopted.
方法：采用隨機、雙盲、雙中心前瞻性研究。