[1] Kyung Hee Univ, Kyung Hee Univ Hosp, Div Infect Dis, Dept Internal Med,Sch Med, Seoul 02447, South Korea
[2] Kyung Hee Univ, Kyung Hee Univ Hosp, Dept Pathol, Sch Med, Seoul 02447, South Korea
[3] Kyung Hee Univ Hosp, Div Pulm Allergy & Crit Care Med, Dept Internal Med, Seoul 02447, South Korea