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3. Open haemorrhoidectomy (St Mark’s ligation/excision method);Allen-Mersh TG,1993
4. Usefulness of lateral internal sphincterotomy in reducing postoperative pain after open hemorrhoidectomy;Kanellos I;World J Surg,2005
5. Indications for internal medioposterior with anoplasty of lateral sphincterotomy during hemorrhoidectomy: our experience;DiBella F;Minerva Chirurgica,1990