Michiels Ian, De Valck Claudia, De Loor Jeanette, Hendriks Jeroen, Jacquemyn Yves, Tjalma Wiebren A
Department of Obstetrics and Gynaecology, University Hospital Antwerp, Belgium.
Acta Obstet Gynecol Scand. 2007;86(3):380-1. doi: 10.1080/00016340600608550.