https://pmc.ncbi.nlm.nih.gov/articles/PMC1191571/
Botulinum toxin injections in the internal anal sphincter for the treatment of chronic anal...
OBJECTIVE: To investigate the effects of two different dosage regimens of botulinum toxin to induce healing in patients with idiopathic anal fissure. SUMMARY...
botulinum toxin injectionsinternal anal sphincter