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Varshney, P. M.; Ray, M. S.; Nagyan, T.; Malhi, S. S.; Thakore, D. H.; Modi, N. A.; Gupta, S. Comparative Study of Unilateral Subcutaneous Internal Anal Sphincterotomy and 02% Diltiazem Local Application in Acute Fissure in Ano: A Study of 40 Patients over 01 Year. Int Surg J 2021, 8, 530-535.