1. Department of Otolaryngology‑Head and Neck Surgery, Nara Medical University, Kashihara, Nara 634‑8522, Japan
2. Department of Otorhinolaryngology‑Head and Neck Surgery, Nippon Life Hospital, Osaka‑city, Osaka 550‑0006, Japan
3. Department of Cancer Genomics and Medical Oncology, Nara Medical University, Kashihara, Nara 634‑8522, Japan
4. Department of Diagnostic Pathology, Nara Medical University, Kashihara, Nara 634‑8522, Japan