- Correspondence to Dr Lisa Barker, Neonatal Intensive Care Unit, Leicester Royal Infirmary, Infirmary Square, Leicester LE1 5WW, UK;
- Received 28 January 2013
- Revised 26 February 2013
- Accepted 27 February 2013
- Published in print 6 April 2013.
- Published online 9 April 2013.
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