[1] Sungkyunkwan Univ, Dept Mol Cell Biol, Sch Med, Suwon 440746, South Korea
[2] Asian Pacific Res Fdn Infect Dis, Seoul, South Korea
[3] Kyunghee Univ Hosp, Seoul, South Korea
[4] Sungkyunkwan Univ, Div Infect Dis, Samsung Med Ctr, Sch Med, Seoul, South Korea