1. Department of Palliative Medicine, Yokohama Municipal Citizen's Hospital, Yokohama, Kanagawa 240‑8555, Japan
2. Department of Biostatistics, Kyoto Prefectural University of Medicine, Kyoto, Kyoto 602‑8566, Japan
3. Division of Integrated Oncology, Institute of Biomedical Research and Innovation, Kobe, Hyōgo 650‑0047, Japan
4. Division of Medical Oncology, Osaka City General Hospital, Osaka, Osaka 534‑0021, Japan
5. Department of Pulmonary Medicine, Kyoto Prefectural University of Medicine, Kyoto, Kyoto 602‑8566, Japan
6. Division of Respiratory Medicine and Oncology, Gifu Municipal Hospital, Gifu, Gifu 500‑8513, Japan
7. Department of Respiratory Medicine, Aichi Cancer Center Aichi Hospital, Okazaki, Aichi 444‑0011, Japan
8. Department of Respiratory Medicine, National Hospital Organization Hokkaido Cancer Center, Sapporo, Hokkaido 003‑0804, Japan
9. Department of Respiratory Medicine, Toneyama National Hospital, Toyonaka, Osaka 560‑0045, Japan
10. Division of Hematology/Oncology, Tokai University School of Medicine, Isehara, Kanagawa 259‑1193, Japan
11. Clinical Trial Coordination Office, Shizuoka Cancer Center, Shizuoka, Shizuoka 411‑8777, Japan
12. Department of Integrated Science and Engineering for Sustainable Society, Chuo University, Tokyo 112‑8551, Japan
13. Medical Oncology, Teikyo University School of Medicine, Tokyo 173‑8606, Japan