1. Department of Otorhinolaryngology, Head and Neck Surgery; Faculty of Medical Sciences; University of Fukui; Fukui Japan
2. Research and Education Program for Life Science; University of Fukui; Fukui Japan
3. Department of Anatomy; Faculty of Medical Sciences; University of Fukui; Fukui Japan
4. Division of Dentistry and Oral Surgery; Department of Sensory and Locomotor Medicine; Faculty of Medical Sciences; University of Fukui; Fukui Japan