New England Journal of Medicine · 1999 · 382 citations · 20 references
Although treatment with either topical nitroglycerin or botulinum toxin is effective as an alternative to surgery for patients with chronic anal fissure, botulinum toxin is the more effective nonsurgical treatment.
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‘Reversible chemical sphincterotomy’ by local application of glyceryl trinitrate
P B Loder, Michael A. Kamm, R J Nicholls et al. · British journal of surgery · 1994 · 251 citations
Sustained internal sphincter hypertonia in patients with chronic anal fissure
Ridzuan Farouk, G. S. Duthie, A. B. MacGregor et al. · Diseases of the Colon & Rectum · 1994 · 210 citations