McCarthy, Nicola
Article History
First Online: 11 December 2014
Change Date: 23 January 2015
Change Type: Erratum
Change Details: In the version that was originally published, the competing interests statement for the author was omitted. This has now been added in the online version to state that the author declares no competing interests.
Competing interests
: The author declares no competing financial interests.
Free to read: This content has been made available to all.