- Correspondence to Dr Helen A Brough, Children's Allergy Service, Guy's and St Thomas’ NHS Foundation Trust, 2nd Floor, Stairwell B, South Wing, Westminster Bridge Road, London SE1 7EH, UK;
- Received 28 February 2014
- Revised 17 July 2014
- Accepted 28 July 2014
- Published online 21 August 2014.
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