1. Department of Intensive Care Medicine, Bern University Hospital and University of Bern, Bern, Switzerland.
2. Department of Neurology/Neurovascular Diagnostics, Bern University Hospital and University of Bern, Bern, Switzerland.
3. Department of Neurosurgery, University Hospital Halle, Halle, Germany.
4. Department of Neurosurgery, Bern University Hospital and University of Bern, Bern, Switzerland.