9Pendas S, Dauway E, Cox CE, et al. Sentinel node biopsy and cytokeratin staining for the accurate staging of 478 breast cancer patients[J].Am Surg, 1999, 65(6): 500-505.
10Rosen PP, Saigo PE, Braun DW, et al. Axillary micro-and macrometastases in breast cancer: prognostic significance of tumor size [J]. Ann Surg, 1981, 194(5): 585-591.