1. Department of Thoracic Surgery, Kyoto University Graduate School of Medicine , Kyoto, Japan
2. Central Research Laboratories, Kureha Corporation , Fukushima, Japan
3. Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine , Kyoto, Japan
4. Department of Diagnostic Pathology, Kyoto University Hospital , Kyoto, Japan
5. Department of Otolaryngology Head and Neck Surgery, Kyoto University Graduate School of Medicine , Kyoto, Japan