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Original Article
Yalena Amador-Cañizares, Gillian Martínez-Donato, Liz Álvarez-Lajonchere, Claudia Vasallo, Mariacarla Dausá, Daylen Aguilar-Noriega, Carmen Valenzuela, Ivette Raíces, Jean Dubuisson, Czeslaw Wychowski, Zurina Cinza-Estévez, Marlén Castellanos, Magdalys Núñez, Anny Armas, Yaimé González, Ismariley Revé, Ivis Guerra, Ángel Pérez Aguiar, Santiago Dueñas-Carrera 
World J Gastroenterol 20(1):148-162. Published online Jan 7, 2014. doi: 10.3748/wjg.v20.i1.148
Tomasz Dawiskiba, Stanisław Deja, Agata Mulak, Adam Ząbek, Ewa Jawień, Dorota Pawełka, Mirosław Banasik, Agnieszka Mastalerz-Migas, Waldemar Balcerzak, Krzysztof Kaliszewski, Jan Skóra, Piotr Barć, Krzysztof Korta, Kornel Pormańczuk, Przemyslaw Szyber, Adam Litarski, Piotr Młynarz 
World J Gastroenterol 20(1):163-174. Published online Jan 7, 2014. doi: 10.3748/wjg.v20.i1.163
Brief Article
Sébastien Küry, Céline Garrec, Fabrice Airaud, Flora Breheret, Virginie Guibert, Cécile Frenard, Shuo Jiao, Dominique Bonneau, Pascaline Berthet, Céline Bossard, Olivier Ingster, Estelle Cauchin, Stéphane Bezieau 
World J Gastroenterol 20(1):204-213. Published online Jan 7, 2014. doi: 10.3748/wjg.v20.i1.204
Meta-Analysis
Case Report
Letters To The Editor