1. Department of Cerebrovascular Disease Kyushu Rosai Hospital Kitakyushu Japan
2. Department of Neurosurgery Kyushu Rosai Hospital Kitakyushu Japan
3. Department of Neurosurgery Fukuoka Children's Hospital Fukuoka Japan
4. Department of Neurosurgery Graduate School of Medical Sciences Kyusyu University Fukuoka Japan
5. Department of Clinical Chemistry and Laboratory Medicine Kyushu University Hospital Fukuoka Japan