[1] Kitasato Univ, Sch Med, Resp Med, Sagamihara, Kanagawa, Japan
[2] Teikyo Univ, Div Med Oncol, Dept Internal Med, Sch Med, Tokyo, Japan
[3] Japanese Red Cross Okayama Hosp, Resp Med, Okayama, Japan
[4] Yokohama Municipal Citizens Hosp, Yokohama, Kanagawa, Japan
[5] Komagome Hosp, Tokyo Metropolitan Canc & Infect Dis Ctr, Tokyo, Japan
[6] Chiba Univ, Chiba, Japan
[7] Kurume Univ, Sch Med, Kurume, Fukuoka, Japan
[8] Thorac Oncol Res Grp, Yokohama, Kanagawa, Japan