1. Division of Perioperative Intensive Care Medicine, Cantonal Hospital St.Gallen, St. Gallen, Switzerland.
2. Stroke Research Group, Department of Clinical Neurosciences, University Hospital and Faculty of Medicine, Geneva, Switzerland.
3. Department of Neurosurgery, Cantonal Hospital St. Gallen, St. Gallen, Switzerland.
4. Department of Emergency Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.