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1Intensive Care Units, Division of Anaesthesia and Intensive Care Medicine, Department
of Surgery, Helsinki University Central Hospital, Helsinki, Finland. 2Department of
Clinical Sciences, University of Helsinki, Helsinki, Finland. 3ANZIC Research Centre,
Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive
Medicine, Monash University, Melbourne, VIC, Australia. 4Division of Intensive Care,
Kuopio University Hospital, Kuopio, Finland. 5Department of Intensive Care, North
Karelia Central Hospital, Joensuu, Finland.