1. Suita Tokushukai Hospital, Suita, Japan;
2. Department of Surgery, Kindai University Faculty of Medicine, Osakasayama, Japan;
3. Department of Biostatistics, Yokohama City University School of Medicine, Yokohama, Japan;
4. Department of Thoracic and Breast Surgery, Oita University Faculty of Medicine, Oita, Japan;
5. Department of Thoracic Surgery and Oncology, National Cancer Center Hospital East, Chiba, Japan;
6. Kyushu University Hospital, Fukuoka, Japan;
7. Department of Medical Oncology, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan;
8. Aichi cancer center, Nagoya, Japan;
9. Department of Pulmonary Medicine, Sendai Kousei Hospital, Sendai, Japan;
10. Department of Thoracic Oncology, National Hospital Organization Kinki-Chuo Chest Medical Center, Sakai, Japan;
11. Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka, Japan;
12. Kindai University Faculty of Medicine, Osaka, Japan;
13. Department of Surgical Oncology, Hiroshima University, Hiroshima, Japan;
14. Kansai Medical University, Hirakata, Japan;
15. Yamaguchi-Ube Medical Center, Ube, Japan;
16. Department of Respiratory Medicine, Juntendo University School of Medicine, Tokyo, Japan;
17. Department of Thoracic Surgery, Osaka Medical Center for Cancer and Cardivascular Diseases, Osaka, Japan;
18. Department of General Thoracic Surgery, Chiba University Graduate School of Medicine, Chiba, Japan;
19. Kindai University Hospital, Osaka, Japan;