1. Department of Respiratory Medicine and Allergy, Tosei General Hospital, Aichi, Japan
2. Department of Pulmonary Medicine and Oncology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
3. Clincal Research Center, National Hospital Organization Kinki-Chuo Chest Medical Center, Osaka, Japan
4. Division of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Kanagawa, Japan
5. Department of Respiratory Medicine, Toho University Omori Medical Center, Tokyo, Japan
6. Department of Pulmonary Medicine, School of Medicine, International University of Health and Welfare, Chiba, Japan
7. Department of Radiology, Kansai Rosai Hospital, Hyogo, Japan
8. Department of Radiology and
9. Division of Respiratory Medicine, Saiseikai Kumamoto Hospital, Kumamoto, Japan
10. Department of Respiratory Medicine, Toho University Medical Center-Sakura Hospital, Chiba, Japan
11. Department of Respiratory Medicine, National Hospital Organization, Ibarakihigashi National Hospital, Ibaraki, Japan
12. Department of Respiratory Medicine, Kobe City Medical Center General Hospital, Hyogo, Japan
13. Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
14. Department of Pulmonology, Kameda Medical Center, Chiba, Japan
15. Division of Respiratory Diseases, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan
16. Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
17. Department of Respiratory Medicine, Kurashiki Central Hospital, Okayama, Japan
18. Department of Respirology, Graduate School of Medicine, Chiba University, Chiba, Japan
19. Division of Pulmonary Medicine, Department of Medicine, Jichi Medical University, Tochigi, Japan
20. Department of Respiratory Medicine, Ogaki Municipal Hospital, Gifu, Japan
21. Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Shizuoka, Japan
22. Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
23. Department of Respiratory Medicine, Tohoku Medical and Pharmaceutical University, Miyagi, Japan
24. Department of Respiratory Medicine, Japan Railway Tokyo General Hospital, Tokyo, Japan
25. Department of Respiratory Medicine and Allergology, Faculty of Medicine, Kindai University, Osaka, Japan
26. Department of Respiratory Medicine, National Hospital Organization Himeji Medical Center, Hyogo, Japan
27. Department of Respiratory Medicine, Tenri Hospital, Nara, Japan
28. Department of Respiratory Medicine, Fukuoka University Hospital, Fukuoka, Japan
29. Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Aichi, Japan
30. Department of Respiratory Medicine, Tokyo Medical University Hospital, Tokyo, Japan
31. Asahi-Kasei Pharma Corporation, Tokyo, Japan; and
32. Department of Advanced and Integrated Interstitial Lung Diseases Research, School of Medicine, Toho University, Tokyo, Japan