4Shalaby A. Randomized clinical trial of stapled versus milligan-morgan haemorrhoidectomy[J]. Br J Surg, 2001,88 : 1049 -1053.
5Paolo B,Pier G. Randomised controlled trial between stapled circumferential mucosectomy and conventional circular hemorrhoidectomy in advanced hemorrhoids with external mucosal prolapse[J]. Am J Surg, 2001,182 ;65.
6Luigi MP,Barbara B. Early and late (ten years)experience with circular stapler hemorrhoidectomy[J]. Dis Colon Recturn, 2001,44 :836.
7Ho YH,Cheong WK. Stapled hemorrhoi dectomy costand effectiveness. Randomized controlled trial including incontinnece scoring, anorectal manometry and endnanoal ultrasound assessments at up to 3months[J]. Dis Colon Rectum, 2000,45:176- 189.
8Molloy RG, Kingsmore D. Life threatening pelvic sepsis after stapled haemorrhoidectomy [ J ]. Lancet, 2000, 355 : 1729 -1730.
9Ho YH, Tzang C, Tang CL, et al. Anal sphincter injuries from stapling instruments introducd transanallyz randomized controlled study with endoanal ultrasound and anorectal manometry[J]. Dis Colon Rectum, 2000,43: 169- 173.