[1] CHA Hosp, Seongnam, South Korea
[2] Catholic Univ Korea, Div Med Oncol, St Vincents Hosp, Suwon, South Korea
[3] Yonsei Univ, Coll Med, Seoul, South Korea
[4] Univ Ulsan, Asan Med Ctr, Dept Oncol, Coll Med, Seoul, South Korea
[5] Yonsei Univ, Yonsei Canc Ctr, Dept Internal Med, Div Med Oncol,Coll Med, Seoul, South Korea
[6] Haeundae Paik Hosp, Busan, South Korea
[7] Inje Univ, Dept Oncol, Haeundae Paik Hosp, Busan, South Korea
[8] Chonnam Natl Univ, Med Sch, Gwangju, South Korea
[9] Univ Ulsan, Ulsan Univ Hosp, Dept Internal Med, Div Hematol & Oncol,Coll Med, Ulsan, South Korea
[10] Sungkyunkwan Univ, Samsung Med Ctr, Dept Med, Div Hematol Oncol,Sch Med, Seoul, South Korea
[11] Gyeongsang Natl Univ, Gyeongsang Natl Univ Hosp, Dept Internal Med, Div Hematol Oncol,Sch Med, Jinju, South Korea
[12] Gyeongsang Natl Univ Hosp, Jinju Si, South Korea
[13] Sungkyunkwan Univ, Samsung Med Ctr, Sch Med, Seoul, South Korea
[14] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Coll Med, Seognnam, South Korea
[15] Yonsei Canc Ctr, Seoul, South Korea