1. Department of Neurology Japanese Red Cross Akita Hospital Akita Japan
2. Department of Neurology Onoba Hospital Akita Japan
3. Department of Neurology Akita University Hospital Akita Japan
4. Department of Pathology Japanese Red Cross Akita Hospital Akita Japan
5. Department of Neuropathology Research Institute for Brain and Blood Vessels, Akita Cerebrospinal and Cardiovascular Center Akita Japan