Dr Hari Krishnan is a Consultant Paediatric Intensivist at Birmingham Children's Hospital, Birmingham, UK. Dr Miriam R. Fine-Goulden is a Consultant at the Paediatric Intensive Care and South Thames Retrieval Service, Evelina London Children's Hospital, Guy's & St. Thomas' NHS Foundation Trust, London, UK. Dr Sainath Raman is a Senior Medical Officer, Paediatric Intensive Care at Queensland Children's Hospital, Brisbane, QLD, Australia. Dr Akash Deep is Director of the Paediatric Intensive Care Unit, King's College Hospital, London, UK.