Study Design. Retrospective study.

研究设计：回顾性研究。

Study Design: The authors conducted a retrospective study.

研究设计：回顾性研究。

This was a retrospective study of measles cases and deaths in Nepal.

这是一项针对尼泊尔麻疹病例和死亡人数的回顾性研究。

Methods: The retrospective study of clinical laboratory research.

方法：回顾性总结临床实验室研究。

Methods: Retrospective study of 139 cases of hepatic trauma was performed.

对139例肝脏损伤的病例资料进行回顾分析。