- Correspondence to Dr Thomas Krasemann, Evelina London Children's Hospital, Department of Paediatric Cardiology, Guy's & St Thomas NHS Foundation Trust, Westminster Bridge Road, London SE1 7EH, UK;
- Received July 31, 2013
- Revised December 3, 2013
- Accepted December 11, 2013
- First published January 10, 2014.
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