1. Department of Neurosurgery, Fukuoka Children’s Hospital, Fukuoka, Fukuoka, Japan
2. Department of Neuropathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan
3. Department of Pediatrics, Japan Community Health Care Organization (JCHO), Kyushu Hospital, Kitakyushu, Fukuoka, Japan
4. Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Fukuoka, Japan