1. Department of Pathology; Okayama University Graduate School of Medicine; Dentistry and Pharmaceutical Sciences; Okayama Japan
2. Department of Cellular Transplantation Biology (Hematology/Oncology and Respiratory Medicine); Division of Cancer Medicine; Kanazawa University Graduate School of Medical Sciences; Kanazawa Japan
3. Department of Human Morphology; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
4. Department of Otolaryngology Head and Neck Surgery; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
5. Department of Otolaryngology; Himeji Red Cross Hospital; Himeji Japan
6. Division of Pathophysiology; Okayama University Graduate School of Health Sciences; Okayama Japan