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Maniranjan N, Dilawar S. Flap and FiLaCâ„¢ duo heals a complex grade IV anal fistula: case report of a surgical success. Int Surg J [Internet]. 2025 Oct. 28 [cited 2025 Nov. 1];12(11):2012-4. Available from: https://www.ijsurgery.com/index.php/isj/article/view/11435