1. Knauer CM, Silverman S Jr: Alimentary tract and liver.In Current Medical Diagnosis and Treatment 1990, SA Schroeder, MA Krupp, LM Tierney Jr, SJ McPhee (eds). Englewood Cliffs, Prentice-Hall, 1990, pp 376?460
2. LaMont JT, Isselbacher KJ: Diseases of the small and large intestine.In Harrison's Principles of Internal Medicine, 11th ed. E Braunwald, KJ Isselbacher, RG Petersdorf, JD Wilson, JB Martin, AS Fauci (eds). New York, McGraw-Hill, 1988, pp 1290?1302
3. Phillips S: Disorders of gastrointestinal motility.In Cecil Textbook of Medicine, 18th ed. JB Wyngaarden, HS Lloyd (eds). Philadelphia, WB Saunders, 1988, pp 714?725
4. Wald A, Van Thiel DH, Hoechstetter L, Gavaler JS, Egler KM, Verm R, Scott L, Lester R: Gastrointestinal transit. The effect of the menstrual cycle. Gastroenterology 80:1497?1500, 1981
5. Rees WDW, Rhodes J: Altered bowel habit and menstruation. Lancet 2:475, 1976