[1] Catholic Univ Korea, Uijeongbu St Marys Hosp, Coll Med, Dept Surg, Uijongbu, South Korea
[2] Chonnam Natl Univ, Med Sch, Dept Surg, Hwasun Hosp, 322 Seoyang Ro, Hwasun 58128, South Korea
[3] Natl Evidence Based Healthcare Collaborating Agcy, Seoul, South Korea
[4] Catholic Univ Korea, Incheon St Marys Hosp, Coll Med, Dept Surg, Incheon, South Korea
[5] Yonsei Univ, Coll Med, Dept Surg, Seoul, South Korea
[6] Chungnam Natl Univ Hosp, Dept Surg, Daejeon, South Korea
[7] Inha Univ, Inha Univ Hosp, Sch Med, Sch Med, Incheon, South Korea
[8] Ain Hosp, Incheon, South Korea
[9] Dongnam Inst Radiol & Med Sci, Dept Surg, Busan, South Korea
[10] Catholic Univ Korea, Seoul St Marys Hosp, Coll Med, Dept Anesthesiol & Pain Med, Seoul, South Korea
[11] Seoul Natl Univ, Coll Med, Dept Surg, Seoul Natl Univ Hosp, Seoul, South Korea
[12] Seoul Natl Univ, Canc Res Inst, Seoul, South Korea
[13] Natl Canc Ctr Hosp, Ctr Liver & Pancreatobiliary Canc, 323 Ilsan Ro, Goyang 10408, South Korea