Funding for this research was provided by:
University College London
Article History
Received: 27 June 2020
Revised: 23 August 2020
Accepted: 1 October 2020
First Online: 21 October 2020
Compliance with ethical standards
: The study complied with the Declaration of Helsinki and was approved by the institutional audit review committee of Great Ormond Street Children’s Hospital.
: The authors declare that they have no conflict of interest.