5Azzopardi JG, Chepick OF, Hartmann WH, et al. The World Health Organization histological typing of breast tumors-second edition. Am J Clin Pathol, 1982,78:806-816.
9Nixon AJ, Schnitt SJ, Gelman R, et al. Relationship of tumor grade to other pathologic features and to treatment outcome of patients with early stage breast carcinoma treated with breast-conserving therapy. Cancer, 1996,78:1426-1431.