- Correspondence to Dr Anthony Hart, Department of Paediatric and Neonatal Neurology, Sheffield Children's Hospital NHS Foundation Trust, Ryegate Children's Centre, Tapton Crescent Road, Sheffield, South Yorkshire S10 5DD, UK;
- Received March 11, 2014
- Revised December 10, 2014
- Accepted February 25, 2015
- First published March 30, 2015.
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