1. Department of Neurosurgery; Medical University Vienna; Vienna Austria
2. Department of Health Sciences Research; College of Medicine, Mayo Clinic; Rochester MN
3. Department of Neurology; College of Medicine, Mayo Clinic; Rochester MN
4. Department of Laboratory Medicine and Pathology; Mayo Clinic; Rochester MN
5. Department of Neurology; Copenhagen University Hospital; Bispebjerg Denmark
6. Department of Pathology; Copenhagen University Hospital Rigshospitalet; Copenhagen Denmark
7. Department of Neuropathology; University of Göttingen; Göttingen Germany
8. Department of Neuroimmunology; Center for Brain Research, Medical University of Vienna; Vienna Austria