Raheel Azhar, Aabya Salim, Raazia Ramzan, Areeba Mahmood, Saad Aslam, Sidra Riaz 2023. A Comparative Study of Lateral Sphincterotomy Vs Topical Application of Glyceryl Trinitrate 0.2% in the Treatment of Chronic Anal Fissure an Observational Study. Pakistan Journal of Medical & Health Sciences. 16, 11 (Jan. 2023), 586. DOI:https://doi.org/10.53350/pjmhs20221611586.