Funding for this research was provided by:
National Institute for Health Research (NIHR-IPF-16-10-07)
Article History
Received: 10 April 2020
Accepted: 2 December 2020
First Online: 10 December 2020
Ethics approval and consent to participate
: The study was approved by the School for Policy Studies Ethics and Research Committee at the University of Bristol. Written informed parental consent was obtained from all participants.
: As part of the informed consent process, parents provided written consent for publication for both parent and child data.
: The authors declare that they have no competing interests.