Zngana AM, Hiwa B. A comparative study between lateral internal anal sphincterotomy and botulinum toxin injection in the treatment of chronic anal fissure. Zanco J Med Sci [Internet]. 2021 Aug. 9 [cited 2024 Apr. 25];25(2):513-9. Available from: https://zjms.hmu.edu.krd/index.php/zjms/article/view/834