Hussain, Shabeer, Ahmed Siddique Ammar, Ahmed Raza Hameed, Imran Aslam, and Ameer Afzal. “Comparison of Outcome of Botulinum Toxin Injection With and Without Glyceryl Trinitrate in Chronic Anal Fissure in Terms of Post Operative Pain and Healing”. Journal of the Pakistan Medical Association 74, no. 7 (June 28, 2024): 1245–1248. Accessed April 20, 2026. https://mail.jpma.org.pk/index.php/public_html/article/view/9726.