1. Department of Intensive Care Medicine, Multidisciplinary Intensive Care Research Organization (MICRO) St. James's Hospital Dublin Ireland
2. Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital University of Oxford Oxford UK
3. Department of Clinical Medicine, School of Medicine Trinity College Dublin Dublin Ireland
4. Hospital Clinic, Institut D'Investigacions Biomediques August Pi i Sunyer (IDIBAPS) Universidad de Barcelona Barcelona Spain