1. Department of Otolaryngology‑Head and Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan
2. Department of Diagnosic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan
3. Department of Diagnostic Pathology, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan
4. Department of Otolaryngology‑Head and Neck Surgery, Japanese Red Cross Osaka Hospital, Osaka 543‑8555, Japan
5. Department of Otolaryngology‑Head and Neck Surgery, Kitano Hospital Tazuke Medical Research Institute, Osaka 530‑8480, Japan
6. Department of Thoracic Surgery, Graduate School of Medicine, Kyoto University, Kyoto 606‑8507, Japan