[1] Okayama Univ Hosp, Allergy & Resp Med, Okayama, Japan
[2] Okayama Univ Hosp, Ctr Clin Oncol, Okayama, Japan
[3] Iwakuni Med Ctr, Resp Med, Iwakuni, Japan
[4] Okayama Med Ctr, Resp Med, Okayama, Japan
[5] Japanese Red Cross Soc Himeji Hosp, Resp Med, Himeji, Hyogo, Japan
[6] Kawasaki Med Sch, Gen Internal Med 4, Okayama, Japan
[7] Shikoku Canc Ctr, Resp Med, Matsuyama, Ehime, Japan
[8] Chugoku Cent Hosp, Resp Med, Fukuyama, Hiroshima, Japan
[9] Tsuyama Chuo Hosp, Resp Med, Tsuyama, Japan
[10] Okayama Univ Hosp, Innovat Clin Med, Okayama, Japan
[11] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Hematol & Oncol, Okayama, Japan