1. Department of Anesthesiology and Intensive Care, School of Medical Sciences, Faculty of Medicine and Health Örebro University Örebro Sweden
2. College of Medicine and Public Health Flinders University Adelaide South Australia Australia
3. Clinical Epidemiology and Biostatistics, School of Medical Sciences Örebro University Örebro Sweden
4. Turku PET Centre University of Turku and Turku University Hospital Turku Finland
5. Department of Perioperative Services, Intensive Care and Pain Medicine Turku University Hospital Turku Finland