1Gleeson N, Deritt M, Sheppard BL, et al. Endometrial fibrinolyric enzymes in women with normal menstruation and dysfunctional uterine bleeding[ J]. Br J Obstet Gynaecol, 1993, 100: 768.
2Critchley HOD, Bailey DA, Au CL,et al. Immunohistochemieal sex receptor distribution in endometrium from long - term subderreal levonorgestrel users and during the normal menstrual cycle [J]. Hum Reprod, 1993, 8:1632-1639.