1. Section of Paediatrics, Department of Infectious Disease, Imperial College London, London, UK
2. Blizard Institute, Queen Mary Univeristy of London, London, UK
3. Royal London Hospital, Barts Health NHS Trust, London, UK
4. Section of Anaesthetic, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Imperial College London, London, UK
5. Paediatric Intensive Care Unit, St Mary’s Hospital, London, UK