[1] Nippon Med Sch, Grad Sch Med, Dept Pulm Med & Oncol, Tokyo, Japan
[2] Saitama Med Univ, Dept Resp Med, Int Med Ctr, Hidaka, Japan
[3] Nippon Med Sch, Musashikosugi Hosp, Dept Pulm Med, Kawasaki, Kanagawa, Japan
[4] Tokyo Metropolitan Canc & Infect Dis Ctr, Komagome Hosp, Dept Thorac Oncol & Resp Med, Tokyo, Japan
[5] Ishikawa Prefectural Cent Hosp, Dept Pulm Med, Kanazawa, Ishikawa, Japan
[6] Yokohama Municipal Citizens Hosp, Dept Resp Med, Yokohama, Kanagawa, Japan
[7] Tsuboi Canc Ctr Hosp, Jizankai Med Fdn, Dept Internal Med, Fukushima, Japan
[8] Nippon Med Sch, Chiba Hokuso Hosp, Dept Pulm Med, Chiba, Japan
[9] Jichi Med Univ, Dept Pulm Med, Shimotsuke, Tochigi, Japan
[10] Nippon Med Sch, Dept Pulm Med, Chiba Hokuso Hosp, Chiba, Japan
[11] Jichi Med Univ, Dept Pulm Med, Shimotsuke, Tochigi, Japan