1. From the Department of Anesthesiology, Section of Neuroanesthesia, Aarhus University, Aarhus, Denmark
2. Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
3. Department of Anesthesiology, Horsens Regional Hospital, Horsens, Denmark
4. Institute of Neuroradiology, Charité, Universitätsmedizin, Berlin, Germany
5. Department of Neurosurgery, Aarhus University Hospital, Aarhus, Denmark
6. Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark; the Neuroradiology Research Unit, Section of Neuroradiology, Department of Radiology, Aarhus University Hospital, Aarhus, Denmark