1. Department of Pathology, Faculty of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan
2. Department of Neurosurgery, Faculty of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan
3. Department of General Thoracic, Breast, and Pediatric Surgery, Faculty of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan