1. Department of Thoracic Surgery, The University of Tokyo Hospital
2. Department of Thoracic Surgery, Kyoto University Hospital
3. Department of Thoracic Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
4. Department of Thoracic Surgery, Tohoku University Hospital
5. Department of Thoracic, Breast and Endocrine, and Pediatric Surgery, Fukuoka University Hospital
6. Department of General Thoracic Surgery, Osaka University Hospital
7. Department of General Thoracic Surgery, Dokkyo Medical University Hospital
8. Department of Surgery, Division of Surgical Oncology, Nagasaki University Hospital
9. Department of General Thoracic Surgery, Chiba University Hospital