1. Centre for Outcomes and Experience Research in Children’s Health, Illness and Disability (ORCHID), Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom.
2. Children’s Acute Transport Service (CATS), Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom.
3. Anaesthetics, Pain Medicine and Intensive Care (APMIC) Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom.
4. Paediatric Intensive Care, Nottingham University Hospital NHS Trust, Nottingham, United Kingdom.