1. Department of Anatomic Pathology, Hirosaki University Graduate School of Medicine
2. Department of Otorhinolaryngology and Head and Neck Surgery, Kurume University School of Medicine
3. Department of Diagnostic Pathology, Kurume University Hospital
4. Department of Diagnostic Pathology, Yao Tokushukai General Hospital
5. Department of Diagnostic Pathology and Cytology, Osaka International Cancer Institute