1 Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital, University of Helsinki, Helsinki, Finland. pekka.jakkula@hus.fi.
2 Department of Anaesthesiology, Intensive Care and Pain Medicine and Department of Emergency Medicine and Services, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.
3 Department of Anaesthesiology, Intensive Care and Pain Medicine, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.
4 Department of Anaesthesiology and Intensive Care, Kuopio University Hospital, University of Eastern Finland, Kuopio, Finland.