Methods We randomly assigned 2287 patients with stable coronary disease to PCI plus optimal medical therapy or to optimal medical therapy alone.

方法：我们随机分配2287例稳定性冠心病患者接受PCI加优化药物治疗或者单用优化药物治疗。

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Methods We randomly assigned women with breast cancer to sentinel-lymph-node biopsy plus axillary dissection or sentinel-lymph-node biopsy alone.

方法：我们随机分配女性乳腺癌患者接受前哨淋巴结活检和腋窝淋巴结清扫或只接受前哨淋巴结活检。

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Methods we randomly assigned patients who were referred for preoperative staging of NSCLC to either conventional staging plus pet-ct or conventional staging alone.

方法：我们将符合要求进行NSCLC术前分期的患者随机分为两组，即一组为传统分期法加pet—ct，另一组为单独的传统分期法。

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