- Correspondence to Dr Paolo De Coppi and Dr Simon Eaton, Surgery Unit, University College London Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK; and
- Received 30 October 2012
- Revised 25 January 2013
- Accepted 1 March 2013
- Published in print 23 March 2013.
- Published online 24 March 2013.
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