METHODS:60cases of AD were randomly divided into trial group and control group.

方法：60例AD患儿随机分为治疗组和对照组。

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Methods 120 cases of senile osteoporosis were randomly divided into trial group and control group.

方法选择120例老年性骨质疏松症患者，随机分为观察组和对照组。

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Methods A total of 106 DCM patients with heart failure were allotted into trial group and control group at random.

方法将106例患者随机分为两组，在常规抗心力衰竭基础上，渝疗组加用二丁酰环磷腺苷钙静脉给药；

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Though faecal transplantation for C. difficile has still to undergo a formal clinical trial, with a proper control group, it looks a promising (and cheap) answer to a serious threat.

ECONOMIST: The human microbiome

However, the realization that the more infrequent visit schedule and less intense support for the control group might be limitations of the trial prompted us to amend the protocol in October 2006.

FORBES: The Mediterranean Diet: The New Gold Standard?

The gold standard for testing medical treatments is the randomized trial, in which patients are randomly assigned to a treatment or control group to spread patient differences evenly and avoid bias in results.

WSJ: Heart Bypass Surgery May Offer Lower Death Risk Than Angioplasty