1Department of Internal Medicine, Division of Medical Oncology and Respiratory Medicine, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane 693-8501 Japan
2Department of Respiratory Medicine, Miyagi Cancer Center, 47-1, Nodayama, Medeshimashiote, Natori, Miyagi 981-1293 Japan
3Department of Respiratory Medicine, Tohoku University Hospital, 1-1, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574 Japan
4Department of Pulmonary Medicine, Sendai Kousei Hospital, 4-15, Hirose-machi, Aoba-ku, Sendai, Miyagi 980-0873 Japan
5Department of Thoracic Oncology, Kansai Medical University Hospital, 2-3-1, Shin-machi, Hirakata, Osaka 573-1191 Japan
6Department of Respiratory Medicine, Asahi General Hospital, Asahi, Chiba 1326289-2511 Japan
7Department of Internal Medicine, Division of Hematology, Rheumatology and Respiratory Medicine, Faculty of Medicine, Kagawa University, 1750-1, Ikenobe, Miki-cho, Kida-gun, Kagawa 761-0793 Japan
8Department of Respiratory Medicine, National Hospital Organization Hokkaido Cancer Center, 2-3-54, 4-jyo, Kikusui, Shiraisi-ku, Sapporo, Hokkaido 003-0804 Japan
9Department of Respiratory Medicine, Saka General Hospital, 16-5, Nishiki-cho, Shiogama, Miyagi 985-8506 Japan
10Department of Thoracic Surgery, Omagari Kosei Medical Center, 8-65, Toori-machi, Omagari, Daisen, Akita 014-0027 Japan
11Division of Clinical Medicine, Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, 2-1-1, Amakubo, Tsukuba, Ibaraki 305-8576 Japan
12Department of Respiratory Medicine, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka, Saitama 350-1298 Japan
13Division of General Thoracic and Thyroid Surgery, Tokyo Medical University, 6-7-1, Nishi-shinjuku, Shinjuku, Tokyo, 160-0023 Japan
14Division of Respiratory Medicine, Department of Internal Medicine, St. Marianna University School of Medicine, 2-16-1, Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511 Japan
15Department of Thoracic Oncology, National Hospital Organization Osaka Toneyama Medical Center, 5-1-1, Toneyama, Toyonaka, Osaka 560-8552 Japan
16Department of Respiratory Medicine, Shimane Prefectural Central Hospital, 4-1-1, Himehara, Izumo, Shimane, 693-8555 Japan
17Department of Allergy and Respiratory Medicine, Okayama University Hospital, 2-5-1, Shikata-cho, Kita-ku, Okayama, 700-8558 Japan
18Division of Pulmonary Medicine, Department of Internal Medicine, Iwate Medical University School of Medicine, 2-1-1, Idaidoori, Yahaba-cho, Shiwa-gun, Iwate, 028-3695 Japan
19Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, 54, Shogoinkawahara-cho, Sakyo-ku, Kyoto, 606-8507 Japan