1. Department of Anaesthesiology and Intensive Care Kuopio University Hospital Kuopio Finland
2. University of Eastern Finland Kuopio Finland
3. Division of Intensive Care Medicine Department of Anaesthesiology, Intensive Care and Pain Medicine Helsinki University Hospital University of Helsinki Helsinki Finland
4. Department of Intensive Care Medicine University Hospital Bern (Inselspital) University of Bern Bern Switzerland
5. Science Service Center Kuopio University Hospital Kuopio Finland