Sheiner E, Gohar J, Mazor M
Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Int J Gynaecol Obstet. 1999 Dec;67(3):175-6. doi: 10.1016/s0020-7292(99)00105-8.