1. Department of Anaesthesiology and Intensive Care Faculty of Medical Sciences University of Warmia and Mazury in Olsztyn Olsztyn Poland
2. Anaesthesiology and Intensive Care Department of Surgical Sciences Akademiska Hospital Uppsala University Uppsala Sweden
3. Department of Anaesthesiology and Intensive Care Medicine Kuopio University Hospital Kuopio Finland
4. Anaesthesiology and Intensive Care Department Central Hospital of South Ostrobothnia Seinäjoki Finland
5. Faculty of Health Sciences School of Medicine Institute of Clinical Medicine University of Eastern Finland Kuopio Finland