[1] Catholic Kwandong Univ, Int St Marys Hosp, Dept Med Oncol, Coll Med, Incheon 22711, South Korea
[2] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Internal Med, Div Hematol & Med Oncol,Sch Med, Seoul 03181, South Korea
[3] Catholic Univ Korea, Eunpyeong St Marys Hosp, Coll Med, Dept Internal Med,Div Oncol, Seoul 03312, South Korea
[4] Catholic Univ Korea, Incheon St Marys Hosp, Coll Med, Dept Internal Med,Div Oncol, Incheon 21431, South Korea
[5] Konyang Univ Hosp, Dept Internal Med, Div Hematol & Med Oncol, Daejeon 35365, South Korea
[6] Keimyung Univ, Dept Internal Med, Div Hematol Oncol, Dongsan Hosp, Daegu 51448, South Korea
[7] Korea Univ, Dept Internal Med, Div Oncol Hematol, Coll Med, Seoul 02841, South Korea
[8] Seoul Natl Univ, Coll Med, Dept Internal Med, Bundang Hosp, Seongnam 13620, South Korea
[9] Yonsei Univ, Yonsei Canc Ctr, Dept Internal Med, Div Med Oncol,Coll Med, Seoul 03722, South Korea
[10] Seoul Natl Univ, Dept Internal Med, Boramae Med Ctr, Seoul 07061, South Korea
[11] Ajou Univ, Dept Hematol Oncol, Sch Med, Suwon 16499, South Korea
[12] Yeungnam Univ, Dept Internal Med, Div Hematol Oncol, Coll Med, Daegu 42415, South Korea
[13] Chung Ang Univ, Chung Ang Univ Hosp, Dept Internal Med, Div Hematol Oncol,Coll Med, Seoul 06973, South Korea
[14] Yonsei Univ, Dept Biomed Syst Informat, Coll Med, Seoul 03722, South Korea
[15] Yonsei Univ, Brain Korea 21 Plus Project Med Sci, Coll Med, Seoul 03722, South Korea
[16] Inst Adv Clin & Biomed Res, HERINGS, Seoul 08378, South Korea