[1] Tohoku Univ Hosp, Dept Resp Med, Sendai, Miyagi, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Biomed Stat & Bioinformat, Kyoto, Japan
[3] Sendai Kousei Hosp, Dept Pulm Med, Sendai, Miyagi, Japan
[4] Komagome Hosp, Tokyo Metropolitan Canc & Infect Dis Ctr, Dept Thorac Oncol & Resp Med, Tokyo, Japan
[5] Miyagi Canc Ctr, Dept Resp Med, Natori, Miyagi, Japan
[6] Kanagawa Cardiovasc & Resp Ctr, Dept Resp Med, Yokohama, Kanagawa, Japan
[7] Nippon Med Sch, Grad Sch Med, Dept Pulm Med & Oncol, Tokyo, Japan
[8] Natl Hosp Org, Asahikawa Med Ctr, Dept Resp Med, Asahikawa, Hokkaido, Japan
[9] Gunma Prefectural Canc Ctr, Dept Resp Med, Ota, Japan
[10] Juntendo Univ, Grad Sch Med, Dept Resp Med, Tokyo, Japan
[11] JCHO Hokkaido Hosp, Dept Resp Med, Sapporo, Hokkaido, Japan
[12] Jichi Med Univ, Div Pulm Med, Dept Internal Med, Shimotsuke, Tochigi, Japan
[13] Saitama Med Univ, Int Med Ctr, Dept Pulm Med, Hidaka, Japan
[14] Tohoku Univ, Dept Resp Med, Sendai, Miyagi, Japan
[15] Tohoku Univ, Sch Med, Dept Palliat Med, Sendai, Miyagi, Japan