[1] Kyungpook Natl Univ, Colorectal Canc Ctr, Chilgok Hosp, Daegu, South Korea
[2] Yeungnam Univ, Div Colon & Rectum, Dept Surg, Coll Med, Daegu, South Korea
[3] Chungnam Natl Univ, Chungnam Natl Univ Hosp, Dept Surg, Coll Med, Dajeon, South Korea
[4] Kyungpook Natl Univ, Daegu, South Korea
[5] Kyungpook Natl Univ, Med Ctr, Sch Med, Colorectal Canc Ctr, Daegu, South Korea
[6] Kyungpook Natl Univ, Sch Med, Dept Oncol Hematol, Med Ctr, Daegu, South Korea
[7] Kyungpook Natl Univ, Sch Med, Dept Oncol Haematol, Med Ctr, Daegu, South Korea
[8] Keimyung Univ, Sch Med, Dept Surg, Dongsan Med Ctr, Daegu, South Korea
[9] Catholic Univ Korea, Seoul St Marys Hosp, Dept Surg, Coll Med, Seoul, South Korea
[10] Pusan Natl Univ, Sch Med, Dept Surg, Yangsan Hosp, Busan, South Korea
[11] Inje Univ, Busan Paik Hosp, Paik Inst Clin Res, Coll Med,Dept Surg, Busan, South Korea
[12] Chungnam Natl Univ, Chungnam Natl Univ Hosp, Dept Surg, Coll Med, Daejeon, South Korea