Methods The level of SDF-1 protein was examined by enzyme linked immunosorbent assay (ELISA) in blood plasma of 26 patients with breast benign tumor and 52 patients with breast cancer.

• 方法 使用ELISA法对26例乳腺良性肿瘤患者和52例乳腺癌患者血浆中的SDF-1蛋白水平进行检测。