[1] Chonbuk Natl Univ, Chonbuk Natl Univ Hosp, Res Inst Clin Med, Dept Surg, 567 Baekje Daero, Jeonju 54896, South Korea
[2] Biomed Res Inst, 567 Baekje Daero, Jeonju 54896, South Korea
[3] Chosun Univ, Chosun Univ Hosp, Coll Med, Dept Surg, Gwangju, South Korea
[4] Soonchunhyang Univ, Bucheon Hosp, Coll Med, Dept Surg, Bucheon, South Korea
[5] Pusan Natl Univ, Yangsan Hosp, Sch Med, Dept Surg, Busan, South Korea
[6] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Surg,Div Breast & Endocrine Surg, Seoul, South Korea
[7] Natl Canc Ctr, Korea Cent Canc Registry, Div Canc Registrat & Surveillance, Goyang, South Korea