Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) GIUSA-CHIFERI MG,"Transvaginal ultrasound, uterine biopsy and hysteroscopy for postmenopausal bleeding",Int J Obstet Gynecol,,,1996,55,,39-44,https://cir.nii.ac.jp/crid/1570854176199037568,https://doi.org/10.1016/0020-7292(96)02720-8