Sexton, David M. H.
Harris, Glen R.
Article History
Received: 6 November 2014
Accepted: 3 June 2015
First Online: 6 July 2015
Change Date: 6 August 2015
Change Type: Corrigendum
Change Details: In the version of this Letter originally published, the use of UK versus England/Wales was inconsistent. The text has been amended to clarify throughout. These errors have been corrected in all versions of the Letter.
Competing interests
: The authors declare no competing financial interests.