另选择20例健康体检者作为正常对照组。
Another 20 healthy individuals were selected as the control groups.
方法：将64例经冠状动脉造影检查诊断的冠心病作为病例组，26例经冠状动脉造影检查排除者作为正常对照组。
Methods: 64 CHD patients who were identified by coronary angiography constituted the case group and the control group was composed of 26 persons with normal coronary angiography result.
方法选取长期服用埃索美拉唑镁片患者100例，根据服用时间长短随机分为3组，另选30例胃镜检查正常者作为正常对照组。
Methods 100 Chinese patients that taking long term esomeprazole magnesium were choosed and randomized into 3 groups, and 30 normal Chinese were choosed as the controls.
另取志愿献髓者骨髓10例作为正常健康人对照组。
Besides these, 10 cases of volunteers' bone marrow were collected as normal control.
另外选择怀化地区汉族30岁以上的227人作为对照组，其中原发性高血压76人，血压正常者151人。
Another 227 Han subjects above 30 years old in Huaihua area were taken as controls (control group), including 76 cases of essential hypertension and 151 cases of normal blood pressure.
选择健康体检者70例作为正常对照组。
方法 随机选 择早孕胚胎停育患者30 例作为实验组，正常早孕人工流产者30 例为对照组。
Methods Thirty women with early spontaneous abortion served as an experimental group and 30 women who had artificial abortion for normal early pregnancy served as a control group.
方法 随机选 择早孕胚胎停育患者30 例作为实验组，正常早孕人工流产者30 例为对照组。
Methods Thirty women with early spontaneous abortion served as an experimental group and 30 women who had artificial abortion for normal early pregnancy served as a control group.
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