Funding for this research was provided by:
Public Health Research Programme (13/164/06)
Text and Data Mining valid from 2018-05-04
Received: 20 March 2017
Accepted: 28 March 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: Ethical approval for the study has been granted by the University of Bristol’s Faculty of Health Sciences Research Ethics Committee (FREC reference number: 28522). Consent of schools was secured at point of recruitment. Teacher and student consent was obtained at point of data collection. Opt-out parental consent was employed.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.