@book{520133,
	author = {ClinicalKey eBooks.},
	title = {Gastroenterology clinics of North America.},
	publisher = {W.B. Saunders Co.},
	address = {Philadelphia :},
	url = {http://ezproxy.alfaisal.edu/login?url=https://www.clinicalkey.com/dura/browse/journalIssue/08898553}
}