1. Department of Respiratory Medicine Hirosaki University Graduate School of Medicine Hirosaki Japan
2. Department of Respiratory Medicine Aomori Prefectural Central Hospital Aomori Japan
3. Department of Respiratory Medicine National Hospital Organization Asahikawa Medical Center Asahikawa Japan
4. Department of Pulmonary Medicine Sendai Kousei Hospital Sendai Japan
5. First Department of Medicine Hokkaido University Hospital Sapporo Japan
6. Department of Respiratory Medicine Oji General Hospital Tomakomai Japan
7. Department of Respiratory Medicine JCHO Hokkaido Hospital Sapporo Japan
8. Department of Respiratory Medicine Sunagawa City Medical Center Sunagawa Japan
9. Department of Pulmonary Medicine Fukushima Medical University School of Medicine Fukushima Japan
10. Department of Respiratory Medicine National Hospital Organization Hokkaido Cancer Center Sapporo Japan
11. Division of Respirology NTT Medical Center Tokyo Tokyo Japan
12. Department of Respiratory Medicine Tohoku University School of Medicine Sendai Japan
13. Department of Respiratory Medicine Saka General Hospital Shiogama Japan
14. Department of Respiratory Medicine Gunma University Maebashi Japan
15. Department of Respiratory Medicine Miyagi Cancer Center Natori Japan
16. Department of Medical Oncology and Respiratory Medicine National Hospital Organization Osaka Minami Medical Center Osaka Japan
17. Department of Respiratory Medicine Asahi General Hospital Chiba Japan
18. Division of Pulmonary Medicine, Allergy, and Rheumatology Iwate Medical University Faculty of Medicine Graduate School of Medicine Morioka Iwate Japan
19. Department of Palliative Medicine Tohoku University School of Medicine Sendai Japan