1. Department of Respiratory Medicine and
2. Department of Thoracic Oncology, Kanagawa Cancer Center, Yokohama, Japan;
3. Division of Thoracic Oncology, Shizuoka Cancer Center, Sunto-gun, Japan;
4. Department of Medical Oncology, Yokohama Municipal Citizen’s Hospital, Yokohama, Japan;
5. Division of Respirology Neurology and Rheumatology, Department of Internal Medicine, Kurume University Hospital, Kurume, Japan;
6. Department of Respiratory Medicine, Matsusaka Municipal Hospital, Matsusaka, Japan;
7. Department of Medical Oncology, Kindai University Hospital, Osakasayama, Japan;
8. Department of Medical Oncology, Chiba University Hospital, Chiba, Japan;
9. Department of Respiratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan;
10. Department of Respiratory Medicine, Kurashiki Central Hospital, Kurashiki, Japan;
11. Department of Respiratory Medicine, Japan Community Health Care Organization Hokkaido Hospital, Sapporo, Japan;
12. Division of Medical Oncology, Department of Internal Medicine, Teikyo University School of Medicine, Itabashi-ku, Japan;
13. Department of Pulmonology, Yokohama City University Graduate School of Medicine, Yokohama, Japan; and
14. Department of Radiology, Kanagawa Cardiovascular and Respiratory Center, Yokohama, Japan;
15. Department of Biostatistics, Yokohama City University School of Medicine, Yokohama, Japan