@book{90049,
	author = {Weisiger, Richard. and Bilhartz, Lyman.},
	title = {Sleisenger& Fordtran's Gastrointestinal and liver disease  review and assessment},
	publisher = {Saunders},
	year = {c1999},
	address = {Filadelfia (Pensilvania, Estados Unidos)},
	note = {Written to accompany Sleisenger & Fordtran's Gastrointestinal and liver disease, 6th edition.}
}