Objective To summarize the external quality control results on the measurement of TC and TG for a multi-center clinical trial.
目的总结多中心临床试验“血脂康调整血脂对冠心病的二级预防研究”中血清总胆固醇（TC）和甘油三酯（TG）测定室间质量控制结果。
Methods: a multi - center randomized comparative clinical trial was conducted.
方法：采用多中心随机比较性临床研究方法。
Methods the effect of rifaximin for the treatment of acute bacterial diarrhea was investigated in a multi center randomized, single blind and clinical trial with control of ciprofloxacin.
方法采用多中心、随机、单盲对照试验，以国产环丙沙星作对照，研究利福昔明治疗细菌感染性腹泻的效果。
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