Funding for this research was provided by:
National Institute for Health Research (ICA-CDRF-2016-02-032)
Received: 4 February 2019
Accepted: 22 May 2019
First Online: 18 June 2019
Ethics approval and consent to participate
: This study complies with the 1975 Declaration of Helsinki. Ethical approval was obtained (ref MREC 1/3/22 by Northeast York Research Committee and approved by the Health Research Authority). Informed parental consent, older adolescent consent and young person age appropriate assent were also obtained. Consent included permission to reproduce anonymised quotations and drawings.
: Not applicable
: The authors declare that they have no competing interests.