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Carlo Fabbri, Carmelo Luigiano, Antonella Maimone, Anna Maria Polifemo, Ilaria Tarantino, Vincenzo Cennamo 
World J Gastrointest Endosc 4(11):479-488. Published online Nov 16, 2012. doi: 10.4253/wjge.v4.i11.479
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Tomas Sjöberg Bexelius, John Blomberg, Yun-Xia Lu, Hans-Olof Håkansson, Peter Möller, Carl-Eric Nordgren, Urban Arnelo, Jesper Lagergren, Mats Lindblad 
World J Gastrointest Endosc 4(11):506-512. Published online Nov 16, 2012. doi: 10.4253/wjge.v4.i11.506
Ioannis S Papanikolaou, Athanasios D Sioulas, Stylianos Kalimeris, Persephone Papatheodosiou, Ioannis Karabinis, Olga Agelopoulou, Iosif Beintaris, Dimitrios Polymeros, George Dimitriadis, Konstantinos Triantafyllou 
World J Gastrointest Endosc 4(11):513-517. Published online Nov 16, 2012. doi: 10.4253/wjge.v4.i11.513