- Correspondence to Dr Heli Nevanlinna, Helsinki University Central Hospital, Department of Obstetrics and Gynecology, Biomedicum Helsinki, PO Box 700, FIN-00029 HUS, Finland;
- Received February 24, 2012
- Revised April 27, 2012
- Accepted May 2, 2012
- First published May 31, 2012.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.