[1] Natl Taiwan Univ Hosp, Dept Oncol, Taipei, Taiwan
[2] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei 100, Taiwan
[3] Natl Taiwan Univ Hosp, Dept Pathol, Taipei 100, Taiwan
[4] Natl Taiwan Univ Hosp, Dept Surg, Taipei 100, Taiwan
[5] Natl Taiwan Univ, Coll Med, Canc Res Ctr, Taipei 10764, Taiwan