Hassan E ul, Ayesha Choudary, Hina Khan, Changazi SH, Bhatti S, Ahmad QA. Outcomes of Closed Versus Open Lateral Internal Anal Sphincterotomy for Chronic Anal Fissure: A Randomized Controlled Trial. J Fatima Jinnah Med Univ. 2026;20(2):72-77. doi:10.37018/XCVB0327