[1] Nihon Univ, Sch Med, Dept Internal Med, Div Resp Med, 30-1 Oyaguchi Kami Cho,Itabashi Ku, Tokyo 1738610, Japan
[2] Juntendo Univ, Fac Med, Dept Resp Med, Tokyo, Japan
[3] Juntendo Univ, Grad Sch Med, Tokyo, Japan
[4] Showa Univ, Sch Med, Dept Med, Div Resp Med & Allergol, Tokyo, Japan
[5] Shizuoka Prefectural Gen Hosp, Dept Resp Med, Shizuoka, Japan
[6] Keio Univ, Sch Med, Dept Med, Div Pulm Med, Tokyo, Japan
[7] Teikyo Univ, Sch Med, Dept Med, Div Resp Med & Allergol, Tokyo, Japan
[8] Okayama Univ, Dept Med Technol, Acad Field Hlth Sci, Okayama, Japan
[9] St Francis Himeji St Marys Hosp, Social Med Corp Fdn, Himeji, Hyogo, Japan
[10] Jinyu Clin, Tokyo, Japan
[11] Akabane Cent Gen Hosp, Div Resp Med, Tokyo, Japan
[12] Natl Ctr Global Hlth & Med, Dept Resp Med, Tokyo, Japan
[13] Dokkyo Med Univ, Sch Med, Dept Pulm Med & Clin Immunol, Mibu, Tochigi, Japan
[14] Tokyo Womens Med Univ, Dept Resp Med, Tokyo, Japan