- Correspondence to Dr Michael Farquhar, Department of Children's Sleep Medicine, Evelina London Children's Hospital, Guy's and St Thomas’ NHS Foundation Trust, London SE1 7EH, UK; ; @DrMikeFarquhar
- Received October 20, 2016
- Revised November 21, 2016
- Accepted November 23, 2016
- First published December 16, 2016.
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