1. Department of Intensive Care Medicine; Kuopio University Hospital; Kys Finland
2. Department of Anaesthesiology, Intensive Care and Pain Medicine; Helsinki University and Helsinki University Hospital; Helsinki Finland
3. Department of Neurosurgery; Helsinki University and Helsinki University Hospital; Helsinki Finland
4. Department of Intensive Care Medicine; Tampere University Hospital; Tampere Finland
5. Department of Neurosurgery; Kuopio University Hospital; Kys Finland
6. Department of Intensive Care Medicine, Inselspital; Bern University Hospital; Bern Switzerland