1. Department of Neurosurgery, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
2. Department of Periodontology and Endodontology, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan
3. Clinical Trial Center, Tokushima University and Tokushima University Hospital, Tokushima, Japan
4. Department of Radiology, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan