4[2]Baden WF,Walker TA. Genesis of the vaginal profile:a correlated classification of vaginal relaxation. Clin Obstet Gynecol, 1972,15:1048-1054.
5[3]Al-Allard P,Rochette L. The descriptive epidemiology of hysterectomy,province of Quebec. Ann Epidemiol,1991,1:541-549.
6[4]Marchionni M,Bracco GL,Checcucci V,et al. True incedence of vaginal vault prolapse:thirteen years experience. J Reprod Med,1999,44:679-684.
7[5]Samuelsson EC,Cictor FTA,Tibblin G. Sings of genital prolapse in a Swedish population of women 20 to 59 years of age and possible related factors. Am J Obstet Gynecol,1999,180:299-305.
8[6]Swift SE.The distrubution of pelvic organ support in a population of female subject seen for routine gynecologic health care. Am J Obstet Gynecol,2000,183:1277-1285.
9[7]Progetto Menopausa Italia Study Group. Risk factors for genital prolapse in non-hysterectomized women around menopause result from a large cross-sectional study in menopausal clinics in Italiy. Eur J Obstet Gynecol Reprod Biol,2000,93:125-140.
10[8]Olsen AL,Smith VJ,Bergstrom JO,et al.Epidemiology of surgicaly managed pelvic organ prolapse and urinary incotinence. Obstet Gynecol,1997,89:501-506.