用前瞻性研究方法对两组进行比较分析。

Prospective method was used in this study.

youdao

方法：采用随机、双盲、双中心前瞻性研究。

Methods: Random, double blind and double central prospective study was adopted.

youdao

方法前瞻性队列研究。

METHOD Design was prospective cohort study.

youdao

方法：采用随机、单盲、前瞻性的临床研究方法。

Method: Adopt the random single blind prospective method in clinic research.

youdao

方法：采用随机、单盲、前瞻性的临床研究方法。

Method: Adopt the random single blind prospective method in clinic research.

youdao