| Affiliation: | 1. Department of Otolaryngology, National Hospital Organization Tokyo Medical Center, , Tokyo, Japan;2. Department of Otorhinolaryngology, Inagi Municipal Hospital, , Tokyo, Japan;3. Department of Otolaryngology, Keio University Hospital, , Tokyo, Japan;4. Division of Otorhinolaryngology, Chiba Children's Hospital, , Chiba, Japan;5. Department of Otolaryngology, Kanto Rosai Hospital, , Kanagawa, Japan;6. Department of Otorhinolaryngology, National Mie Hospital, , Mie, Japan;7. Department of Otorhinolaryngology, National Center for Children and Development, , Tokyo, Japan;8. Department of Otorhinolaryngology, Kobe Children's Hospital, , Hyogo, Japan;9. Department of Otorhinolaryngology, Kanagawa Children's Medical Center, , Kanagawa, Japan;10. Department of Otorhinolaryngology, , Shizuoka General Hospital, Shizuoka, Japan |
