TY - JOUR AU - Brisinda, G; Cadeddu, F; Brandara, F; Marniga, G; Maria, G TI - Randomized clinical trial comparing botulinum toxin injections with 0.2 per cent nitroglycerin ointment for chronic anal fissure JO - Br J Surg IS - 02 VL - 94 PY - 2007 DO - 10.1002/bjs.5514 L3 - PubMed-ID: 17256809 SP - 162 EP - 167 ER -