1. Division of Intensive Care Medicine; Department of Anesthesiology; Intensive Care and Pain Medicine; University of Helsinki and Helsinki University Hospital; Helsinki Finland
2. Department of Neurosurgery; University of Helsinki and Helsinki University Hospital; Helsinki Finland
3. Australian and New Zealand Intensive Care Research Centre; School of Public Health and Preventive Medicine; Monash University; Melbourne, Victoria Australia
4. Department of Intensive Care; Tampere University Hospital; Tampere Finland
5. Department of Intensive Care; North Karelia Central Hospital; Joensuu Finland