1. 1Internal Medicine III, Wakayama Medical University, Kimiidera, Wakayama, Japan.
2. 2Department of Thoracic Oncology, National Hospital Organization Kyushu Cancer Center, Notame, Minami-Ku, Fukuoka, Japan.
3. 3Department of Internal Medicine, Niigata Cancer Center Hospital, Kawagishi-cho, Chuo-Ku, Niigata, Japan.
4. 4Department of Medical Oncology, Kindai University Faculty of Medicine, Onohigashi, Osakasayama, Japan.
5. 5Division of Thoracic Oncology, Kobe Minimally Invasive Cancer Center, Minatojima-Nakamachi, Chuo-Ku, Kobe, Japan.
6. 6Department of Pulmonary Medicine, Sendai Kousei Hospital, Hirosemachi, Aoba-Ku, Sendai, Japan.
7. 7Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Maidashi, Higashi-Ku, Fukuoka, Japan.
8. 8Department of Thoracic Oncology, Shizuoka Cancer Center, Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka, Japan.
9. 9Department of Respiratory Medicine, Kobe City Medical Center General Hospital, Minatojimaminami-Machi, Chuo-Ku, Kobe, Japan.
10. 10Division of Respiratory Medicine, Department of Internal Medicine, St. Marianna University School of Medicine, Sugao, Miyamae-ku, Kawasaki, Japan.
11. 11Department of Biostatistics, Yokohama City University Graduate School of Medicine, Fukuura, Kanazawa-Ku, Yokohama, Japan.