1. Department of Cancer Pathology; Hokkaido University Graduate School of Medicine; Sapporo Japan
2. Department of Diagnostic Pathology; Sapporo Higashi Tokushukai Hospital; Sapporo Japan
3. Department of Otorhinolaryngology; Sapporo Higashi Tokushukai Hospital; Sapporo Japan
4. Department of Translational Pathology; Hokkaido University Graduate School of Medicine; Sapporo Japan
5. Translational Research Laboratory; Hokkaido University Hospital, Clinical Research and Medical Innovation Center; Sapporo Japan