[1] Yonsei Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[2] Yonsei Univ, Coll Med, Dept Lab Med, Seoul, South Korea
[3] Yonsei Univ, Coll Med, Res Inst Bacterial Resistance, Seoul, South Korea
[4] Natl Hlth Insurance Serv, Ilsan Hosp, Infect Control Unit, Goyang, South Korea
[5] Natl Hlth Insurance Serv, Ilsan Hosp, Dept Internal Med, Goyang, South Korea
[6] Natl Hlth Insurance Serv, Ilsan Hosp, Dept Lab Med, Goyang, South Korea