[1] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Oncol, Seoul 138736, South Korea
[2] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Pathol, Seoul, South Korea
[3] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Surg, Seoul, South Korea
[4] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Radiol, Seoul, South Korea
[5] Korea Canc Ctr Hosp, Dept Internal Med, Div Hematol Oncol, Seoul, South Korea
[6] Seoul Natl Univ, Coll Med, Dept Pathol, Seoul 151, South Korea
[7] Seoul Natl Univ, Coll Med, Dept Surg, Seoul 151, South Korea
[8] Seoul Natl Univ, Coll Med, Canc Res Inst, Seoul 151, South Korea