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Riggio O, Angeloni S, Salvatori FM, De Santis A, Cerini F, Farcomeni A, Attili AF, Merli M.Riggio O, et al. Among authors: attili af.Am J Gastroenterol. 2008 Nov;103(11):2738-46. doi: 10.1111/j.1572-0241.2008.02102.x. Epub 2008 Sep 4.Am J Gastroenterol. 2008.PMID: 18775022