1. Department of Neurosurgery; Gunma University Graduate School of Medicine; Maebashi Gunma Japan
2. Department of Molecular and Cellular Neurobiology; Gunma University Graduate School of Medicine; Maebashi Gunma Japan
3. Department of Neurosurgery; Tokyo University Graduate School of Medicine; Bunkyo-ku Tokyo Japan
4. Department of Psychiatry and Neuroscience; Gunma University Graduate School of Medicine; Maebashi Gunma Japan