1 Department of Intensive Care, North Karelia Central Hospital, Joensuu, Finland;Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland;Department of Intensive Care, Tampere University Hospital, Tampere, Finland;Department of Intensive Care, Turku University Central Hospital, Turku, Finland;Department of Intensive Care, Kuopio University Hospital, Kuopio, Finland.