1Writing Group for the Women's Health Initiative Investigators.Risk and benefits of estrogen plus prngestin in healthy postmenopausal women (Principal results from the Women's Health Initiative randomized controlled trial)[J].JAMA,2002,288(3):321 -333.
2Bezirtzoglou E, Voidarou CH,Papadaki A,et al.Hormone therapy altersthe composition of the vaginal microilora in ovariectomized rats [J].Microb Ecol, 2008,55(4) : 751-759.