1. Department of Neurosurgery, Nishichita General Hospital, Tokai, Aichi, Japan
2. Department of Neurosurgery, Fujita Health University, Toyoake, Aichi, Japan
3. Department of Pathology, Nishichita General Hospital, Tokai, Aichi, Japan
4. Department of Comprehensive Strokology, Fujita Health University, Toyoake, Aichi, Japan