Design: Retrospective cohort study.

设计：回顾性队列研究。

youdao

Study Design. Retrospective cohort study.

回顾性研究。

youdao

Study Design. A retrospective matched cohort study with control group.

研究设计：对照配对回顾性队列研究。

youdao

Study Design. A retrospective matched cohort study with control group.

研究设计：对照配对回顾性队列研究。

youdao