Bircher Charles, Afors Karolina, Bircher Martin
Department of Obstetrics and Gynecology, Norfolk and Norwich University Hospital NHS Foundation Trust, Norwich, UK.
Int J Gynaecol Obstet. 2012 Feb;116(2):176-7. doi: 10.1016/j.ijgo.2011.09.013. Epub 2011 Nov 10.