Dey D, Pai G. Prospective comparative study between lateral sphincterotomy and subcutaneous fissurectomy with topical 2% diltiazem gel in the treatment of chronic fissure in ano. Int Surg J [Internet]. 2019 Jun. 29 [cited 2025 Oct. 27];6(7):2571-5. Available from: https://www.ijsurgery.com/index.php/isj/article/view/4496