Received: 20 March 2019
Accepted: 20 June 2019
First Online: 12 July 2019
Ethics approval and consent to participate
: Ethical approval has been obtained from the National Health Service Health Research Authority Yorkshire and the Humber (Bradford Leeds) Research Ethics Committee for the community-based family assessments and school-based measures (reference: 16/YH/0320) and the school-based cognitive and wellbeing assessments (reference: 16/YH/0062). Written consent to participate in the study is provided by parents for the community assessments (for themselves and their child) and school measurement (for their child). Consent for these elements of the study can also be recorded electronically). For the school based cognitive measures an ‘opt out’ consent model is used.
: We have written consent for the use of identifying images in our parent and child feedback leaflets (see Additional files InternalRef removed and InternalRef removed).
: The authors declare that they have no competing interests.