- Correspondence to Dr Jette Led Sørensen, Juliane Marie Centre for Children, Women and Reproduction, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, Copenhagen 2100, Denmark;
- Received July 20, 2013
- Revised July 24, 2014
- Accepted August 6, 2014
- First published September 10, 2014.
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