1. Department of Intensive Care Medicine and Critical Care Medicine Research Group; Tampere University Hospital; Tampere Finland
2. Medical School; University of Tampere; Tampere Finland
3. Department of Anaesthesia and Intensive Care; Helsinki University Hospital; Helsinki Finland
4. Department of Anaesthesiology, Intensive Care, Emergency Care and Pain Medicine; University of Turku and Turku University Hospital; Turku Finland
5. Department of Anaesthesiology, Intensive Care, Emergency Care and Pain Medicine; Helsinki University Central Hospital and Institute of Clinical Medicine; University of Helsinki; Helsinki Finland
6. Department of Surgical Sciences, Anaesthesiology and Intensive Care; Uppsala University; Uppsala Sweden