1. Department of Neurological Surgery, Nippon Medical School Hospital
2. Department of Neurological Surgery, Nippon Medical School Musashi Kosugi Hospital
3. Department of Neurological Surgery, Nippon Medical School Chiba Hokusoh Hospital
4. Department of Emergency and Critical Care Medicine, Nippon Medical School Hospital
5. Department of Neurological Surgery, Nippon Medical School Tama Nagayama Hospital