1. Department of Otolaryngology-Head and Neck Surgery, Kyoto University Graduate School of Medicine, Kyoto City, Japan;
2. Institute for Biomedical Research and Innovation, Kobe City, Japan;
3. Department of Otolaryngology-Head and Neck Surgery, National Hospital Organization Kyoto Medical Center, Kyoto City, Japan;
4. Department of Clinical Biostatistics, Graduate School of Medicine, Kyoto University, Kyoto City, Japan;
5. Department of Otolaryngology-Head and Neck Surgery, Shizuoka General Hospital, Aoi-ku, Shizuoka City, Japan;
6. Department of Otolaryngology, Shiga Medical Center for Children, Moriyama City, Japan;
7. Department of Otolaryngology, Shiga Medical Center Research Institute, Moriyama City, Japan