Funding for this research was provided by:
Versus Arthritis (21791 and 21593)
Received: 27 May 2021
Accepted: 21 October 2021
First Online: 22 November 2021
: All research at Great Ormond Street Hospital NHS Foundation Trust and UCL Great Ormond Street Institute of Child Health is made possible by the NIHR Great Ormond Street Hospital Biomedical Research Centre. The views expressed are those of the author(s) and not necessarily those of the NHS, the NIHR or the Department of Health. Written informed consent was obtained from the parents of the patient.
: Parental consent for publication was obtained.
: The authors declare that they have no competing interests.