1. Department of Thoracic Oncology, National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan
2. Department of Thoracic Surgery, National Cancer Center Hospital, Tokyo, Japan
3. Department of General Thoracic Surgery, Juntendo University Hospital, Tokyo, Japan
4. Department of Thoracic Surgery, Kanagawa Cancer Center, Kanagawa, Japan
5. Department of General Thoracic Surgery, Osaka International Cancer Institute, Osaka, Japan
6. Department of Thoracic Surgery, National Cancer Center Hospital East, Chiba, Japan
7. Department of Thoracic Surgery, Yamagata Prefectural Central Hospital, Yamagata, Japan
8. Department of Thoracic Oncology, Kansai Medical University Hospital, Osaka, Japan
9. Department of Thoracic Surgery, Niigata Cancer Center Hospital, Niigata, Japan
10. Department of Surgical Oncology, Hiroshima University, Hiroshima, Japan