1. Perioperative Medicine and Intensive Care; Karolinska University Hospital; Stockholm Sweden
2. Department of Neuroradiology; Karolinska University Hospital; Stockholm Sweden
3. Department of Medicine Huddinge; Center for Digestive Diseases; Karolinska Institutet; Karolinska University Hospital; Stockholm Sweden
4. Department of Clinical Neuroscience; Karolinska Institutet; Stockholm Sweden
5. Department of Neurology; Karolinska University Hospital; Stockholm Sweden