Pezzoli A, Cifalà V, Simone L, Fusetti N, Cantarini D, Zelante A, Gullini S
Department of Gastroenterology and Endoscopy Unit, University Hospital Sant' Anna, Ferrara, Italy.
Endoscopy. 2007 Feb;39 Suppl 1:E9. doi: 10.1055/s-2006-944863. Epub 2007 Feb 7.