How much of the internal sphincter may be divided during lateral sphincterotomy for chronic anal fissure in women? Morphologic and functional evaluation after sphincterotomy. - Murad-Regadas SM; Fernandes GO; Regadas FS; Rodrigues LV; Pereira Jde J; Regadas Filho FS; Dealcanfreitas ID; Holanda Ede C (Diseases of the colon and rectum, 2013)