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