Funding for this research was provided by:
Research Trainees Coordinating Centre (DRF-2012-05-466)
Article History
Received: 19 April 2017
Accepted: 12 November 2018
First Online: 4 December 2018
Ethics approval and consent to participate
: Ethical approval was granted by the South Yorkshire Research Ethics Committee (Reference number: 11/H1310/3). All participants gave verbal and written assent to participate and their parents gave verbal and written consent for their child to participate.
: Not applicable.
: The authors declare that they have no competing interests.
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