1. Department of Respiratory Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
2. Department of Respiratory Medicine, Otsu City Hospital, Shiga, Japan
3. Department of Pulmonary Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
4. Department of Pulmonary Medicine, Rakuwakai Otowa Hospital, Kyoto, Japan
5. Department of Respiratory Medicine, National Hospital Organization, Kanazawa Medical Center, Ishikawa, Japan
6. Department of Respiratory Medicine, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
7. Third Department of Internal Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
8. Department of Respiratory Medicine, Japanese Red Cross Kyoto Daini Hospital, Kyoto, Japan
9. Department of Respiratory Medicine, National Hospital Organization, Omuta Hospital, Fukuoka, Japan
10. Department of Respiratory Medicine, Fujita Health University, Aichi, Japan
11. Division of Respiratory Medicine, Gunma Prefectural Cancer Center, Gunma, Japan
12. Department of Molecular and Internal Medicine, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
13. Department of Respiratory Medicine, Kyushu Central Hospital of the Mutual Aid Association of Public School Teachers, Fukuoka, Japan
14. Department of Thoracic Surgery, Kanazawa Medical University, Ishikawa, Japan
15. Department of Respiratory Medicine, Yao Tokushukai General Hospital, Osaka, Japan
16. Second Department of Internal Medicine, Nagasaki University Hospital, Nagasaki, Japan
17. Department of Respiratory Medicine, Shiga University of Medical Science Hospital, Shiga, Japan
18. Department of Respiratory Medicine, Kurashiki Central Hospital, Okayama, Japan
19. Department of Respiratory Medicine, Japanese Red Cross Fukui Hospital, Fukui, Japan
20. Division of Respiratory Medicine, Center for Respiratory Diseases, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
21. Department of Respiratory Medicine, National Hospital Organization Nagasaki Medical Center, Nagasaki, Japan
22. Department of Biostatistics, Innovative Clinical Research Center, Kanazawa University, Ishikawa, Japan