1. Department of Paediatrics, Imperial College Healthcare NHS Trust, London, United Kingdom
2. Section of Paediatric Infectious Disease, Department of Infectious Disease, Imperial College London, London, United Kingdom
3. Department of Paediatric Infectious Diseases, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
4. Infection, Immunity, and Inflammation Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
5. Department of Paediatric Infectious Diseases, Evelina London Children’s Hospital, London, United Kingdom
6. Department of Women and Children’s Health, School of Life Course Sciences, Kings College London, London, United Kingdom
7. Faculty of Medicine and Institute for Life Sciences, University of Southampton and NIHR Southampton Clinical Research Facility and NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
8. Children’s Acute Transport Service, Great Ormond Street Hospital for Children, London, United Kingdom
9. Paediatric Cardiology Services, Royal Brompton Hospital, London, United Kingdom
10. Department of Congenital Heart Disease, Evelina London Children’s Hospital, London, United Kingdom
11. Institute in Child Health, King’s College Hospital, London, United Kingdom
12. Paediatric Critical Care Unit, Nottingham Children’s Hospital, Nottingham, United Kingdom
13. Cardiology, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
14. Paediatric Intensive Care, Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom
15. Paediatric Intensive Care, Evelina London Children’s Hospital, London, United Kingdom
16. Kawasaki Disease Research Center, Department of Pediatrics, University of California San Diego