Funding for this research was provided by:
Public Health Research Programme (12/153/39)
Text and Data Mining valid from 2018-11-14
Received: 2 July 2018
Accepted: 22 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: The study received ethical approval from the Wales 3 NHS Research Ethics Committee (reference number 15/WA/0043), and was registered with the ISRCTN registry (ISRCTN16287377). All participants (parents) provided informed consent for participation in the study.
: All participants (parents) provided informed consent for their data to be used and published for research purposes.
: The authors declare that they have no competing interests.
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