Study Design. Literature review.

研究设计：文献综述。

Methods. Literature review.

方法：文献回顾。

The second part of the literature review.

第二部分是文献综述。

Study Design. Case report and literature review.

研究设计：病例报道及文献复习。

The literature review serves several important functions

文献综述有以下一些重要功能