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Open-Access Journal
Editorial
Review
Basic Study
Behzad Yeganeh, Adel Rezaei Moghadam, Javad Alizadeh, Emilia Wiechec, Seyed Moayed Alavian, Mohammad Hashemi, Bita Geramizadeh, Afshin Samali, Kamran Bagheri Lankarani, Martin Post, Payam Peymani, Kevin M Coombs, Saeid Ghavami 
World J Gastroenterol 21(47):13225-13239. Published online Dec 21, 2015. doi: 10.3748/wjg.v21.i47.13225
Retrospective Study
Lei Wang, Xu-An Wang, Jia-Qi Hao, Li-Na Zhang, Mao-Lan Li, Xiang-Song Wu, Hao Weng, Wen-Jie Lv, Wen-Jie Zhang, Lei Chen, Hong-Gang Xiang, Jian-Hua Lu, Ying-Bin Liu, Ping Dong 
World J Gastroenterol 21(47):13316-13324. Published online Dec 21, 2015. doi: 10.3748/wjg.v21.i47.13316
Clinical Trials Study
Observational Study
Marco Milone, Andrea Vignali, Francesco Milone, Giusto Pignata, Ugo Elmore, Mario Musella, Giuseppe De Placido, Antonio Mollo, Loredana Maria Sosa Fernandez, Guido Coretti, Umberto Bracale, Riccardo Rosati 
World J Gastroenterol 21(47):13345-13351. Published online Dec 21, 2015. doi: 10.3748/wjg.v21.i47.13345
Meta-Analysis
Leonardo Zorrón Pu, Eduardo Guimarães Hourneaux de Moura, Wanderley Marques Bernardo, Felipe Iankelevich Baracat, Ernesto Quaresma Mendonça, André Kondo, Gustavo Oliveira Luz, Carlos Kiyoshi Furuya Júnior, Everson Luiz de Almeida Artifon 
World J Gastroenterol 21(47):13374-13385. Published online Dec 21, 2015. doi: 10.3748/wjg.v21.i47.13374
Case Report
Letters To The Editor