Affiliation: | (1) Center for Colorectal Cancer, Research Institute & Hospital, National Cancer Center, 111 Jungbalsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do, 410-769, South Korea;(2) Department of Colon and Rectal Surgery, University of Ulsan College of Medicine and Asan Medical Center, Asanbyeongwon-gil 86, Songpa-gu, Seoul, 138-736, South Korea;(3) Department of Colon and Rectal Surgery, Seoul National University of Medicine, 28 Yeongeon-dong, Jongno-gu, Seoul, 110-744, South Korea; |