1. Department of Otolaryngology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan;
2. Department of Otolaryngology, Nara Medical University, Kashihara, Japan;
3. Department of Otolaryngology – Head and Neck Surgery, Kansai Rosai Hospital, Amagasaki, Japan;
4. Department of Otorhinolaryngology – Head and Neck Surgery, Osaka General Medical Center, Osaka, Japan;
5. Department of Anatomy and Developmental Neurobiology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan;
6. Department of Anatomy, Kanazawa Medical University, Kahoku, Japan;
7. School of Nutritional Science, Nagoya University of Arts and Sciences Graduate School of Nutritional Science, Nagoya, Japan