1. Rome Foundation (2006) Rome III diagnostic criteria for functional gastrointestinal disorders, Rome III: the functional gastrointestinal disorders. (3rd edn), Degnon Associates, Inc, McLean, Virginia, USA, pp. 885-897.
2. Functional bowel disorders;Longstreth;Gastroenterology 130(5),2006
3. A prospective assessment of bowel habit in irritable bowel syndrome in women: defining an alternator;Drossman;Gastroenterology 128(3),2005
4. US Department of Health and Human Services, Food and Drug Administration & Center for Drug Evaluation and Research (CDER) (2012) Guidance for industry: irritable bowel syndrome - clinical evaluation of drugs for treatment. p. 1-14.
5. US Department of Health and Human Services, Food and Drug Administration & Center for Drug Evaluation and Research (CDER), Center for Biologics Evaluation and Research (CBER) & Center for Devices and Radiological Health (CDRH) (2009) Guidance for industry: patient-reported outcome measures: use in medical product development to support labeling claims. p. 1-39.