[1] Kanazawa Univ Hosp, Resp Med, Kanazawa, Ishikawa, Japan
[2] Kouseiren Takaoka Hosp, Dept Med Oncol, Takaoka, Toyama, Japan
[3] Ishikawa Prefectural Cent Hosp, Dept Resp Med, Kanazawa, Ishikawa, Japan
[4] Fukui Ken Saiseikai Hosp, Dept Resp Med, Fukui, Japan
[5] Komatsu Municipal Hosp, Dept Resp Med, Komatsu, Japan
[6] Natl Hosp Org Kanazawa Med Ctr, Dept Resp Med, Kanazawa, Ishikawa, Japan
[7] Keiju Med Ctr, Dept Internal Med, Nanao, Japan