1. Department of Neurosurgery, Institute of Brain and Blood Vessels, Mihara Memorial Hospital
2. Department of Neurosurgery, Takasaki Medical Center
3. Department of Stroke Medicine, Institute of Brain and Blood Vessels, Mihara Memorial Hospital
4. Department of Neurology, Institute of Brain and Blood Vessels, Mihara Memorial Hospital
5. Department of Neurosurgery, Keio University School of Medicine
6. Department of Neurology, Nippon Medical School