[1] Korea Ctr Dis Control & Prevent, Natl Inst Hlth, Ctr Infect Dis Res, Div Bacterial Dis Res, Cheongju 28159, Chungcheongbuk, South Korea
[2] Chosun Univ, Sch Med, Dept Internal Med, Gwangju 61452, South Korea
[3] Chungnam Natl Univ Hosp, Div Infect Dis, Daejeon 35015, South Korea
[4] Catholic Univ Korea, St Vincents Hosp, Dept Internal Med, Div Infect Dis,Sch Med, Suwon, South Korea
[5] Yeungnam Univ, Coll Med, Dept Internal Med, Daegu, South Korea