| Anniko M | Department of Otolaryngology, Hiroshima University Faculty of Medicine, Hiroshima, Japan. |
| Horii A | Department of Otolaryngology, Osaka University Medical School, Japan. ahorii@ent.med.osaka-u.ac.jp |
| Iwasaki S | Department of Otolaryngology, University of Tokyo, Japan. |
| Kitahara M | Department of Otolaryngology, Osaka University, School of Medicine, Osaka, Japan. |
| Kitahara T | Department of Otolaryngology, Osaka University, School of Medicine, Osaka, Japan. tkitahara@ent.med.osaka-u.ac.jp |
| Kubo T | Department of Otolaryngology, Osaka University Medical School, Japan. |
| Naganuma H | Department of Otorhinolaryngology, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan. naganuma@kitasato-u.ac.jp |
| Okamoto M | Department of Otorhinolaryngology, Kitasato University School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan. |
| Onuki J | Department of Otolaryngology, Tokai University School of Medicine, Isehara, Japan. |
| Sato R | Department of Otolaryngology, Tokai University School of Medicine, Isehara, Japan. |
| Takai Y | Department of Otolaryngology, University of Tokyo, Japan. |
| Takumida M | Department of Otolaryngology, Hiroshima University Faculty of Medicine, Hiroshima, Japan. masati@hiroshima-u.ac.jp |