Botulinum toxin injection versus lateral internal sphincterotomy in the treatment of chronic anal fissure: a non-randomized controlled trial.
Giral A, Memisoglu K, Gültekin Y, Imeryüz N, Kalayci C, Ulusoy NB, Tözün N.
BMC Gastroenterol. 2004 Mar 22; 4:7. Epub 2004 Mar 22.
[BMC Gastroenterol. 2004]