Funding for this research was provided by:
Public Health Research Programme (13/90/30)
Text and Data Mining valid from 2018-04-25
Received: 3 January 2018
Accepted: 14 March 2018
First Online: 25 April 2018
Ethics approval and consent to participate
: Ethics approval was obtained from the College of Medicine, Biological Sciences and Psychology ethics representative at the University of Leicester. School principals provided written consent for their school to participate. Parents/guardians were provided with an opt out consent form and only pupils who did not return the opt out consent form participated. Participants provided verbal assent prior to each measurement session and could withdraw at any time.
: Not applicable.
: All authors have completed the Unified Competing Interest form (available on request from the corresponding author) and declare: no support from any organisation for the submitted work, no financial relationships with any organisations that might have an interest in the submitted work in the previous three years and no competing interest related to this work. MJD and KK reports personal fees from Novo Nordisk, Sanofi-Aventis, Lilly, Merck Sharp & Dohme, Boehringer Ingelheim, AstraZeneca, Janssen, Servier, Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceuticals International Inc. and grants from Novo Nordisk, Sanofi-Aventis, Lilly, Boehringer Ingelheim, and Janssen. Outside of the submitted work, JC reports grants from Public Health Wales. CE reports grants from National Institute for Health Research Public Health Research during the conduct of the study. YC, TP, RTE, DB, TG, DMH, AR, LS and TY all have nothing to declare.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.