Tunçay Yildiz Ayhan, Oztürk Dilek, Tok Burçak, Demirdöven Gülçin, Omurcan Cengiz
Social Insurance Institute, Göztepe Educational Hospital, Clinic of Obstetrics and Gynaecology, Istanbul, Turkey.
Aust N Z J Obstet Gynaecol. 2003 Aug;43(4):331-3. doi: 10.1046/j.0004-8666.2003.00084.x.