[1] Yonsei Univ Hlth Syst, Yonsei Canc Ctr, Seoul, South Korea
[2] Yonsei Univ, Yonsei Canc Ctr, Coll Med, Seoul, South Korea
[3] Yonsei Univ, Coll Med, Seoul, South Korea
[4] Yonsei Univ, Coll Med, Dept Internal Med, Div Med Oncol, Seoul, South Korea
[5] Song Dang Inst Canc Res, Seoul, South Korea
[6] Chonnam Natl Univ, Sch Med, Gwangju, South Korea
[7] Sungkyunkwan Univ, Sch Med, Kangbuk Samsung Hosp, Div Hematol & Med Oncol,Dept Internal Med, Seoul, South Korea
[8] Yonsei Univ, Dept Pathol, Coll Med, Seoul, South Korea
[9] Yonsei Univ, Gangnam Severance Hosp, Coll Med, Seoul, South Korea
[10] Hallym Univ, Dept Internal Med, Sacred Heart Hosp, Anyang Si, South Korea