[1] Hiroshima Univ, Project Res Ctr Nosocomial Infect Dis, Minami Ku, Hiroshima 7348551, Japan
[2] Hiroshima Univ, Dept Bacteriol, Grad Sch Biomed & Hlth Sci, Minami Ku, Hiroshima 7348551, Japan
[3] Hiroshima Univ, Grad Sch Biomed & Hlth Sci, Dept Surg, Minami Ku, Hiroshima 7348551, Japan
[4] West Japan Railway Co, Hiroshima Gen Hosp, Clin Lab, Higashi Ku, Hiroshima 7320057, Japan
[5] Shiga Med Ctr Adults, Clin Lab, Moriyama, Shiga 5248524, Japan
[6] Wakayama Rosai Hosp, Dept Clin Lab, Wakayama 6408505, Japan
[7] Hyogo Med Univ Hosp, Clin Lab, Nishinomiya, Hyogo 6638501, Japan
[8] Hiroshima Univ Hosp, Div Infect Dis, Hiroshima 7348551, Japan