5Lee DW, Chan AC, Sze TS, et al. Patient-controlled sedation versus intravenous sedation for colonoscopy in elderly patients: a prospective randomized controlled trial. Gastrointest Endosc. 2002; 56(5): 629-632.
6Boring CC, Squires TS, Tong T, et al. Cancer statistics[ J] .CA cancer J Clin, 1997,43(1) :7.
7Sail F, Beyer HG. The value of follow - up of curative surgery of colorectal carcinoma[ J]. Cancer DetectPrev, 1993,17(22) :417.
8Enker WE, Thaler HT, Gonor ML, et al. Total mesorectal escision int eh operative treatment of carcionma of the rectum[J].J Am Coll Surg, 1995,18(4):335.
9Arenas RB, Fichem A, Mhoon D, et al. Total mesenteric excision in the surgical treatment of rectal cancer: a prospective study[J] .Arch Surg,1998,133(6)606.
10Marting AL,Holm T, Eutqvist LE et al. Effect of a surgical training programme on sutcome of rectal cancer in the country of slokeholm clorectal cancer study group,basing sloke bawel research project[ J] .Lancet,2000,9224:93.