[1] Catholic Univ Korea, Coll Med, Uijeongbu St Marys Hosp, Dept Internal Med, Gyeonggi Do, South Korea
[2] Ewha Womans Univ Hosp, Seoul, South Korea
[3] Ewha Womans Univ, Dept Internal Med, Div Hematol Oncol, Seoul, South Korea
[4] Ewha Womans Univ, Seoul, South Korea
[5] Ewha Womans Univ, Sch Med, Seoul, South Korea
[6] Ewha Womans Univ, Sch Med, Dept Internal Med, Div Hematol Oncol, Seoul, South Korea
[7] Ewha Womans Univ Hosp, Seoul, South Korea