1. Department of Otolaryngology, University of Tokushima Graduate School of Biomedical Sciences, Tokushima, Japan
2. Department of Otolaryngology, Tokushima Prefectural Central Hospital, Tokushima, Japan
3. Department of Otolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Suita, Japan
4. Department of Otolaryngology-Head and Neck Surgery, Osaka General Medical Center, Osaka, Japan
5. Department of Anatomy and Developmental Neurobiology, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
6. Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Kashihara, Japan