1. Department of Thoracic Surgery, National Cancer Center Hospital
2. Division of General Thoracic Surgery, Juntendo University Hospital, Tokyo
3. Department of Thoracic Surgery, Kanagawa Cancer Center, Kanagawa
4. Department of Thoracic Surgery, Osaka International Cancer Institute, Osaka
5. Division of Thoracic Surgery, National Cancer Center Hospital East, Chiba
6. Department of Chest Surgery, St. Marianna University School of Medicine, Kanagawa
7. Department of Respiratory Medicine, Kurashiki Central Hospital
8. Department of Thoracic Oncology and Respiratory Medicine, Tokyo Metropolitan Komagome Hospital
9. Department of Thoracic Surgery, Niigata Cancer Center, Niigata
10. Department of Surgical Oncology, Hiroshima University, Hiroshima, Japan