5Lund JN,Parsons SL.Scholefield JH.Sposm of the internal sphincter in anal fissure:Cause of effect?Gastroenterterology,1996,110:A711.
6Lund JN,Scholefield JH.A randomized,prospective,double-blind.placebo-controlled trial of glyceryl trinitrate ointment in treatment of anal fissure..Lancet,1997,349:11-14.
7Oettle GJ.Glyceryl trinitrate vs sphincterotomy for treatment of chronic fissure-in-ano:a randomized,controlled trial.Dis Colon Rectum,1997,40:1 318-1 320.
8Dorfman G,Levitt M,Platell C.Treatment of chronic anal fissure with topical glyceryl trinitrate.Dis Colon Rectun,1999,42:1 007-1 010.
9Lund JN,Scholefield JH.Folow-up of patients with chronic anal fissure treated with topical glyceryl trinitrate.Lancet,1998,352:1 681.
10Bacher H,Mischinger HJ,Werkgartner G,et al.Local nitroglycerin for treatment of anal fissures:an alternative to lateral sphincterotomy.Dis Colon Rectum,1997,40:840-845.