Clemente Gennaro, Sarno Gerardo, De Rose Agostino M
Department of Surgical Sciences, Agostino Gemelli School of Medicine, Catholic University of Sacred Heart, Rome, Italy.
Gastroenterology. 2009 Mar;136(3):e5-6. doi: 10.1053/j.gastro.2008.10.035. Epub 2009 Jan 22.