1. Health Services Research
2. Health Economics and Decision Science
3. Institute of General Practice, School of Health and Related Research, University of Sheffield, Sheffield, United Kingdom
4. Intensive Care Unit, Royal Liverpool Children's Hospital, Liverpool, United Kingdom
5. General Infirmary at Leeds, Leeds, United Kingdom
6. Intensive Care National Audit and Research Centre, London, United Kingdom
7. Department of Medicine, Children's Hospital Boston, Boston, Massachusetts