Population-based surveillance studies using laboratory-confirmed cases were sought for each incidence group by a computerized search of the scientific literature.

检索相关科学文献，为每个发病率组检索出基于人群监测研究并采用实验室检查确诊的病例数据。

youdao

Methods: 100 cases of CRF were randomly divided into treatment group and control, with 50 cases in each group.

方法：将符合诊断标准的CRF患者100例，随机分成两组，治疗组和对照组各50例。

youdao

Methods 60 accompanying relatives were randomly divided into intervention group and non-intervention group(each group 30 cases), intervention group was given health education and psycho-intervention.

方法将60名陪护随机分为干预组与非干预组各30名。 干预组给予健康教育和心理干预。

youdao

The tortoise spat is one of about 60 cases presented each year to the ICZN, a little-known group that functions as the world's arbiter for animals' scientific names.

WSJ