Authors: M I Diaz; A Valdivia; P Martinez; J L Palacios; P Harris; J Novales; E Garrido; D Valderrama; C Shilling; A Kirberg; E Hebel; J Fierro; R Bravo; F Siegel; G Leon; G Klapp; A Venegas Journal: World J Gastroenterol Date: 2005-10-28 Impact factor: 5.742