1. Department of Otorhinolaryngology, Head and Neck Surgery, International University Of Health and Welfare School of Medicine
2. Department of Otorhinolaryngology, Tokyo Saiseikai Central Hospital
3. Department of Otorhinolaryngology, Head and Neck Surgery, Kawasaki Municipal Kawasaki Hospital
4. Department of Otorhinolaryngology, Head and Neck Surgery, Keio University School of Medicine