[1. Ram E, Alper D, Stein GY, Bramnik Z, Dreznik Z. Internal anal sphincter function following lateral internal sphincterotomy for anal fissure: a long-term manometric study. Ann Surg. 2005; 242:208-11.10.1097/01.sla.0000171036.39886.fa]Search in Google Scholar
[2. Herzig DO, Lu KC. Anal fissure. Surg Clin North Am. 2010; 90:33-44.10.1016/j.suc.2009.09.002]Search in Google Scholar
[3. Nelson RL. Operative procedures for fissure in ano. Cochrane Database Syst Rev. 2010; (1):CD002199.10.1002/14651858.CD002199.pub3]Search in Google Scholar
[4. Arroyo A, Perez F, Serrano P, Candela F, Lacueva J, Calpena R. Surgical versus chemical (botulinum toxin) sphincterotomy for chronic anal fissure: long-term results of a prospective randomized clinical and manometric study. Am J Surg. 2005; 189:429-34.10.1016/j.amjsurg.2004.06.045]Search in Google Scholar
[5. Iswariah H, Stephens J, Rieger N, Rodda D, Hewett P. Randomized prospective controlled trial of lateral internal sphincterotomy versus injection of botulinum toxin for the treatment of idiopathic fissure in ano. ANZ J Surg .2005; 75:553-5.10.1111/j.1445-2197.2005.03427.x]Search in Google Scholar
[6. Shao WJ, Li GC, Zhang ZK. Systematic review and meta-analysis of randomized controlled trials comparing botulinum toxin injection with lateral internal sphincterotomy for chronic anal fissure. Int J Colorectal Dis. 2009; 24:995-1000.10.1007/s00384-009-0683-5]Search in Google Scholar
[7. Maria G, Brisinda G. Nonoperative management of chronic anal fissure. Dis Colon Rectum. 2000; 43: 721-6.10.1007/BF02235597]Search in Google Scholar
[8. Truong DD, Stenner A, Reichel G. Current clinical applications of botulinum toxin. Curr Pharm Des. 2009; 15:3671-80.10.2174/138161209789271843]Search in Google Scholar
[9. Brisinda G, Cadeddu F, Mazzeo P, Maria G. Botulinum toxin A for the treatment of chronic anal fissure. Expert Rev Gastroenterol Hepatol. 2007; 1:219-28.10.1586/17474124.1.2.219]Search in Google Scholar
[10. Thornton MJ, Kennedy ML, King DW. Prospective manometric assessment of botulinum toxin and its correlation with healing of chronic anal fissure. Dis Colon Rectum. 2005; 48:1424-31.10.1007/s10350-005-0025-9]Search in Google Scholar
[11. Hyman N. Incontinence after lateral internal sphincterotomy: a prospective study and quality of life assessment. Dis Colon Rectum. 2004; 47:35-8.10.1007/s10350-003-0002-0]Search in Google Scholar
[12. Brisinda G, Albanese A, Cadeddu F, Bentivoglio AR, Mabisombi A, Marniga G, et al. Botulinum neurotoxin to treat chronic anal fissure: results of a randomized “Botox vs. Dysport” controlled trial. Aliment Pharmacol Ther. 2004; 19:695-701.10.1111/j.1365-2036.2004.01895.x]Search in Google Scholar
[13. Minguez M, Herreros B, Espi A, Garcia-Granero E, Sanchiz V, Mora F, et al. Long-term follow-up (42 months) of chronic anal fissure after healing with botulinum toxin. Gastroenterology. 2002; 123:112-7.10.1053/gast.2002.34219]Search in Google Scholar