1. The Department of Neurology, Neurological Institute, Nippon Medical School Chiba-Hokusoh Hospital
2. The Department of Neurosurgery, Neurological Institute, Nippon Medical School Chiba-Hokusoh Hospital
3. The Department of Internal Medicine, Nippon Medical School Chiba-Hokusoh Hospital
4. The Department of Neurosurgery, Nippon Medical School
5. The Second Department of Internal Medicine, Nippon Medical School