Nassar A H, Khalil A M, Seoud M A F, Usta I M
Department of Obstetrics and Gynecology, American University of Beirut Medical Center,P. O. Box: 113-6044/B36, Beirut, Lebanon.
Int J Gynaecol Obstet. 2005 Jul;90(1):78-9. doi: 10.1016/j.ijgo.2005.03.021.