- Correspondence to Mr Christoph Lees, Department of Fetal Medicine, Rosie Hospital, Addenbrooke's Hospital, Cambridge University Hospitals NHS Foundation Trust, Hills Road, Cambridge CB2 2QQ, UK;
- Received March 14, 2013
- Revised May 28, 2013
- Accepted May 29, 2013
- First published July 5, 2013.
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