Spada Cristiano, Riccioni Maria Elena, Petruzziello Lucio, Marchese Michele, Urgesi Riccardo, Costamagna Guido
Digestive Endoscopy Unit, Catholic University, Rome, Italy.
Gastrointest Endosc. 2008 Oct;68(4):807-8. doi: 10.1016/j.gie.2008.01.030. Epub 2008 Apr 9.