Billi P, Bassi M, Luigiano C, Ferrara F, Ghersi S, Cirelli M R, D'Imperio N
Unit of Gastroenterology and Digestive Endoscopy, AUSL Bologna, Bellaria-Maggiore Hospital, Bologna, Italy.
Endoscopy. 2012;44 Suppl 2 UCTN:E98. doi: 10.1055/s-0030-1256683. Epub 2012 Apr 3.