1. Department of Perioperative Services; Intensive Care and Pain Medicine; Turku University Hospital; Turku Finland
2. Department of Applied Physics; University of Eastern Finland; Kuopio Finland
3. Turku PET Centre; University of Turku; Turku Finland
4. Intensive Care Unit; Tampere University Hospital; Tampere Finland
5. Turku PET Centre and Department of Pharmacology and Clinical Pharmacology; University of Turku; Turku Finland
6. Departments of Clinical Neurophysiology; Turku University Hospital and Clinical Neurophysiology; University of Turku; Turku Finland