Funding for this research was provided by:
Economic and Social Research Council (1482460)
National Institute for Health Research (09/3005/09)
Text and Data Mining valid from 2019-12-01
Received: 30 May 2019
Accepted: 26 November 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: The study was conducted according to the guidelines laid down in the Declaration of Helsinki. The project received ethical approval from the Queen Mary University of London Research Ethics Committee (QMREC2011/40), the Association of Directors of Children’s Services (RGE110927), and the London Boroughs Research Governance Framework (CERGF113). Headteachers gave written consent for the study to take place within their school, parents gave passive informed consent for their child to participate, and adolescent participants gave written informed assent.
: Not application.
: The authors declare that they have no competing interests.