title: Internal sphincterotomy versus rotation flap to treat chronic anal fissures.
authors: Department of Surgery, National University Hospital, Singapore. surhead@nus.edu.sg
authors: Adrian
authors: A
authors: Leong
mesh_terms: D002908:Chronic Disease; D004724:Endoscopy / Q000379:methods*; D005242:Fecal Incontinence / Q000517:prevention & control; D005260:Female; D005401:Fissure in Ano / Q000175:diagnosis / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011446:Prospective Studies; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D012846:Singapore; D013524:Surgical Flaps; D016896:Treatment Outcome