[1] Yonsei Univ, Coll Med, Canc Metastasis Res Ctr, Dept Internal Med, Seoul 120752, South Korea
[2] Yonsei Univ, Coll Med, Yonsei Canc Ctr, Seoul 120752, South Korea
[3] Yonsei Univ, Coll Med, Liver Canc Special Clin, Dept Internal Med, Seoul 120752, South Korea
[4] Yonsei Univ, Coll Med, Dept Radiol, Seoul 120752, South Korea
[5] Yonsei Univ, Coll Med, Dept Radiol Oncol, Seoul 120752, South Korea
[6] Yonsei Univ, Coll Med, Brain Korea Project Med Sci 21, Seoul 120752, South Korea