1. Department of Perioperative Medicine and Intensive Care, Karolinska University Hospital, Stockholm, Sweden, and University of Helsinki;
2. Department of Emergency Care and Services, Helsinki University Hospital, and University of Helsinki;
3. Department of Anesthesiology and Intensive Care, Kuopio University Hospital, and University of Eastern Finland, Kuopio;
4. Department of Intensive Care, Turku University Hospital, and University of Turku;
5. Emergency Medical Services and Department of Intensive Care, Tampere University Hospital, and Tampere University, Tampere;
6. Division of Intensive Care, Medical Research Center Oulu, Oulu University Hospital, Research Group of Anesthesiology, Surgery and Intensive Care Medicine, University of Oulu; and
7. Department of Neurosurgery, Helsinki University Hospital, and University of Helsinki, Finland