1. School of Medicine, Dentistry and Biomedical SciencesQueen’s University BelfastBelfast, Northern Ireland
2. Regional Intensive Care UnitRoyal Victoria HospitalBelfast, Northern Ireland
3. Australian and New Zealand Intensive Care Research CentreMonash UniversityMelbourne, Victoria, Australia
4. Department of Intensive CareAlfred HospitalMelbourne, Victoria, Australia
5. Department of Anaesthesia and Intensive Care MedicineSt. Vincent’s University HospitalDublin, Ireland
6. School of Medicine and Medical SciencesUniversity College DublinDublin, Ireland