| Affiliation: | 1. Department of Otolaryngology Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;2. Department of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;3. Department of Epidemiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;4. Department of Otolaryngology, Okayama Medical Center, Okayama, Japan;5. Kagawa Rosai Hospital, Kagawa, Japan;6. Fukuyama City Hospital, Hiroshima, Japan;7. Kagawa Prefectural Central Hospital, Kagawa, Japan;8. Okayama Saiseikai General Hospital, Okayama, Japan;9. Hiroshima City Hospital, Hiroshima, Japan;10. Okayama Red Cross Hospital, Okayama, Japan;11. Department of Hematology and Oncology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;12. Department of Hematology and Oncology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan;13. Department of Internal Medicine, Toyama Prefectural Central Hospital, Toyama, Japan |
