[1] Kyoto Prefectural Univ Med, Kyoto, Japan
[2] Japanese Red Cross Kyoto Daiichi Hosp, Kyoto, Japan
[3] Fukuchiyama City Hosp, Fukuchiyama, Japan
[4] Japanese Red Cross Kyoto Daini Hosp, Kyoto, Japan
[5] Uji Tokushukai Med Ctr, Uji, Kyoto, Japan
[6] Niigata Univ, Grad Sch Med & Dent Sci, Dept Resp Med & Infect Dis, Niigata, Japan