- Correspondence to Dr The Thanh Diem Nguyen, Portex Respiratory Unit, UCL Institute of Child Health, 30 Guilford Street, LondonWC1N 1EH, UK;
- Received June 18, 2013
- Revised August 22, 2013
- Accepted August 28, 2013
- First published September 26, 2013.
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
Files in this Data Supplement:
- Data supplement 1 - Online supplement
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.