1. Department of Neurology, Shonan Fujisawa Tokushukai Hospital, Japan
2. Department of Pathology, Shonan Fujisawa Tokushukai Hospital, Japan
3. Department of Surgery, Shonan Fujisawa Tokushukai Hospital, Japan
4. Department of Surgery, Shonan Kamakura General Hospital, Japan
5. Department of Surgery, University Hospitals of Cleveland and Case Western Reserve University School of Medicine, USA
6. Department of Neurology, Tokai University Oiso Hospital, Japan