Funding for this research was provided by:
British Heart Foundation (PG/12/70/29777)
Received: 12 July 2019
Accepted: 16 January 2020
First Online: 29 January 2020
Ethics approval and consent to participate
: Study procedures were approved by the Loughborough University Ethical Advisory Committee (R13-P25). Parents or legal guardians’ consent was obtained for each participant below the age of 16 by providing written consent (signed and returned a consent form to opt-in).
: Not applicable.
: The authors declare that they have no competing interests.