OBJECTIVE: We assessed in a randomized study the feasibility and efficacy of awake video-assisted thoracoscopic bullectomy with pleural abrasion to treat spontaneous pneumothorax.

目的：我们在一项随机研究中评估清醒下胸腔镜肺大疱伴胸膜磨损手术治疗自发性气胸的可行性及有效性。

youdao

Researchers conducted a randomized study of 675 patients diagnosed with stage three colon cancer.

VOA: standard.2010.03.18

"The biggest mistake of ablation was that there wasn't a big randomized study when the technology came out, " he says.

FORBES: Tumor Zappers

It is a randomized controlled study, meaning that similar patients were assigned at random to either get either Centrum or placebo.

FORBES: Do Vitamins Prevent Cancer? The Answer Will Give You Whiplash

For one, the groups noted the analysis is a retrospective study, not a prospective, randomized controlled clinical trial, which many regard as a gold standard for ferreting out safety concerns.

FORBES: The Confusion Over A Pair Of Diabetes Drugs And Pancreatitis