1. Department of Anesthesiology and Intensive Care Medicine; Sahlgrenska Academy; Sahlgrenska University Hospital; University of Gothenburg; Gothenburg Sweden
2. Department of Radiology; Sahlgrenska Academy; Sahlgrenska University Hospital; University of Gothenburg; Gothenburg Sweden
3. Department of Neurology; Sahlgrenska Academy; Sahlgrenska University Hospital; University of Gothenburg; Gothenburg Sweden