1. Department of Surgery, Teikyo University School of Medicine, Tokyo, Japan
2. Department of Thoracic Surgery, Niigata Cancer Center Hospital, Niigata, Japan
3. Department of General Thoracic Surgery, Dokkyo Medical University, Tochigi, Japan
4. Department of General Thoracic Surgery, Saitama International Medical Center, Saitama Medical University, Saitama, Japan
5. Department of Surgery I, Tokyo Women's Medical University, Tokyo, Japan
6. Department of General Thoracic Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
7. Department of Thoracic Surgery, Saitama Cardiovascular and Respiratory Center, Saitama, Japan
8. Department of Thoracic and Cardiovascular Surgery, Nara Medical University, Nara, Japan
9. Department of General Thoracic Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan