Wray A M, Landy H J, Meck J M
Georgetown University Hospital, Department of Obstetrics and Gynecology, 3800 Reservoir Road, 3 PHC, Washington, DC 20007-2119, USA.
Int J Gynaecol Obstet. 2005 Nov;91(2):170-1. doi: 10.1016/j.ijgo.2005.07.015. Epub 2005 Sep 13.