Statistics from Altmetric.com
This is a reprint of a paper that fi rst appeared in BMJ Case Reports, BMJ Case Reports 2010; doi:10.1136/bcr.10.2009.2341.
Competing interests None.
Patient consent Patient/guardian consent was obtained for publication.
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.