Funding for this research was provided by:
NIHR Collaboration for Leadership in Applied Health (CLAHRC) Yorkshire and Humber
Received: 31 May 2018
Accepted: 18 January 2019
First Online: 4 February 2019
Ethics approval and consent to participate
: Ethics approval was received from the University of Bradford Ethics Committee (E536 on 06/06/2016). Written consent was gained from parents and teachers. Signed child assent was gained from children whose parents consented for their participation.
: Not applicable.
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