1. Section of Anaesthetics, Pain Medicine, and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, United Kingdom
2. Children’s Acute Transport Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
3. Clinical Trials Unit, Intensive Care National Audit & Research Centre, London, United Kingdom
4. Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, United Kingdom
5. Parent representative, Sussex, United Kingdom
6. Birmingham Children’s Hospital, Birmingham Women’s and Children’s NHS Foundation Trust, Birmingham, United Kingdom
7. Institute of Applied Health Research, University of Birmingham, Birmingham, United Kingdom
8. School of Health & Society, University of Salford, Salford, United Kingdom
9. Paediatric Intensive Care Unit, Bristol Royal Hospital for Children, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, United Kingdom
10. Paediatric Intensive Care Unit, Great Ormond Street Hospital for Children NHS Foundation Trust and NIHR Biomedical Research Centre, London, United Kingdom
11. University College London Great Ormond St Institute of Child Health, London, United Kingdom
12. Leeds Institute for Data Analytics, School of Medicine, University of Leeds, Leeds, United Kingdom
13. for the FIRST-ABC Step-Down RCT Investigators and the Paediatric Critical Care Society Study Group