1. Department of Respiratory Medicine, Tohoku University Hospital, Sendai, Japan
2. Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto, Japan
3. Department of Respiratory Medicine, Sendai Kosei Hospital, Sendai, Japan
4. Department of Thoracic Oncology and Respiratory Medicine, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo, Japan
5. Department of Respiratory Medicine, Miyagi Cancer Center, Natori, Japan
6. Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan
7. Department of Pulmonary Medicine and Oncology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
8. Asahikawa Medical Center, Asahikawa, Japan
9. Department of Respiratory Medicine, Gunma Prefectural Cancer Center, Ota, Japan
10. Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
11. Department of Respiratory Medicine, Japan Community Health Care Organization Hokkaido Hospital, Sapporo, Japan
12. Department of Respiratory Medicine, Jichi Medical University, Shimotsuke, Japan
13. Department of Respiratory Medicine, Saitama Medical University International Medical Center, Hidaka, Japan
14. Tohoku University, Sendai, Japan
15. Department of Palliative Medicine, Tohoku University School of Medicine, Sendai, Japan