Funding for this research was provided by:
National Institute for Health Research
Received: 15 April 2020
Accepted: 23 June 2020
First Online: 7 July 2020
Ethics approval and consent to participate
: The local research ethics board approved this study (Great Ormond Street research ethics committee reference: 14/LO/0420). All research was conducted in accordance with the Declaration of Helsinki and ICH GCP. Written informed consent was collected from all parent/guardians of infants involved in this study.
: All data used for publication is de-identified. Original consent form completed by caregivers sought for approval for consent for publication.
: The authors declare they have no competing interests.