Methods 200 cases of breast cancers and 200 cases of benign breast disease were divided into two groups using paired design.
Methods 200 cases of breast cancers and 200 cases of benign breast disease were divided into two groups using paired design.
方法 对 2 0 0例乳腺癌和 2 0 0例良性乳腺疾病患者用生活事件调查表进行调查。