[1] CHA Univ, Sch Med, Seongnam, South Korea
[2] CHA Univ, Sch Med, CHA Bundang Med Ctr, Dept Med Oncol, Seongnam, South Korea
[3] Inje Univ, Coll Med, Dept Internal Med, Div Gastroenterol,Haeundae Paik Hosp, Busan, South Korea
[4] Univ Ulsan, Coll Med, Ulsan Univ Hosp, Dept Internal Med, Ulsan, South Korea
[5] CHA Univ, Sch Med, Dept Internal Med, Div Med Oncol,Sch Med, Seongnam, South Korea
[6] CHA Bundang Med Ctr, Dept Radiol, Seongnam, South Korea
[7] CHA Univ, Sch Med, CHA Bundang Med Ctr, Dept Radiol, Seongnam, South Korea
[8] Yonsei Univ, Coll Med, Dept Internal Med, Div Med Oncol,Yonsei Canc Ctr, Seoul, South Korea
[9] Yonsei Univ, Coll Med, Dept Internal Med, Div Med Oncol,Yonsei Canc Ctr, Seoul, South Korea
[10] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Div Hematol Oncol,Dept Med, Seoul, South Korea