- Correspondence to Professor Simon Bailey, Department of Child Health, Great North Childrens Hospital, Newcastle upon Tyne NE39 1HD, UK;
- Received November 29, 2013
- Revised January 10, 2014
- Accepted January 19, 2014
- First published February 21, 2014.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.