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Open-Access Journal
Editorial
Opinion Review
Review
Alberto Nicoletti, Francesca Romana Ponziani, Marco Biolato, Venanzio Valenza, Giuseppe Marrone, Gabriele Sganga, Antonio Gasbarrini, Luca Miele, Antonio Grieco 
World J Gastroenterol 25(33):4814-4834. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4814
Minireviews
Gerard Feeney, Rishabh Sehgal, Margaret Sheehan, Aisling Hogan, Mark Regan, Myles Joyce, Michael Kerin 
World J Gastroenterol 25(33):4850-4869. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4850
Anja Šterbenc, Erika Jarc, Mario Poljak, Matjaž Homan 
World J Gastroenterol 25(33):4870-4884. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4870
Basic Study
Giovanni Dothel, Chiara Bernardini, Augusta Zannoni, Maria Rosaria Spirito, Roberta Salaroli, Maria Laura Bacci, Monica Forni, Fabrizio De Ponti 
World J Gastroenterol 25(33):4892-4903. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4892
Michelle L Boland, Denise Oró, Kirstine S Tølbøl, Sebastian T Thrane, Jens Christian Nielsen, Taylor S Cohen, David E Tabor, Fiona Fernandes, Andrey Tovchigrechko, Sanne S Veidal, Paul Warrener, Bret R Sellman, Jacob Jelsing, Michael Feigh, Niels Vrang, James L Trevaskis, Henrik H Hansen 
World J Gastroenterol 25(33):4904-4920. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4904
Retrospective Cohort Study
Du Cai, Zeng-Hong Huang, Hui-Chuan Yu, Xiao-Lin Wang, Liang-Liang Bai, Guan-Nan Tang, Shao-Yong Peng, Ying-Jie Li, Mei-Jin Huang, Guang-Wen Cao, Jian-Ping Wang, Yan-Xin Luo 
World J Gastroenterol 25(33):4945-4958. Published online Sep 7, 2019. doi: 10.3748/wjg.v25.i33.4945
Retrospective Study
Observational Study
Meta-Analysis