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Open-Access Journal
Editorial
Niki Christou, Jeremy Meyer, Christian Toso, Frédéric Ris, Nicolas Christian Buchs 
World J Gastroenterol 25(31):4294-4299. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4294
Review
Ben Murray, Lucia Barbier-Torres, Wei Fan, José M Mato, Shelly C Lu 
World J Gastroenterol 25(31):4300-4319. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4300
Piera Zaccari, Vincenzo Cardinale, Carola Severi, Federica Pedica, Guido Carpino, Eugenio Gaudio, Claudio Doglioni, Maria Chiara Petrone, Domenico Alvaro, Paolo Giorgio Arcidiacono, Gabriele Capurso 
World J Gastroenterol 25(31):4343-4359. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4343
Lucia Cerrito, Brigida Eleonora Annicchiarico, Roberto Iezzi, Antonio Gasbarrini, Maurizio Pompili, Francesca Romana Ponziani 
World J Gastroenterol 25(31):4360-4382. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4360
Minireviews
Richard Zheng, Courtney L Devin, Michael J Pucci, Adam C Berger, Ernest L Rosato, Francesco Palazzo 
World J Gastroenterol 25(31):4427-4436. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4427
Mariella Faccia, Maria Elena Ainora, Francesca Romana Ponziani, Laura Riccardi, Matteo Garcovich, Antonio Gasbarrini, Maurizio Pompili, Maria Assunta Zocco 
World J Gastroenterol 25(31):4437-4451. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4437
Basic Study
Retrospective Study
Peter Hoffmann, Johannes Krisam, Cyrill Wehling, Petra Kloeters-Plachky, Yvonne Leopold, Nina Belling, Annika Gauss 
World J Gastroenterol 25(31):4481-4492. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4481
Observational Study
Si-Cheng Zhou, Yan-Tao Tian, Xue-Wei Wang, Chuan-Duo Zhao, Shuai Ma, Jun Jiang, Er-Ni Li, Hai-Tao Zhou, Qian Liu, Jian-Wei Liang, Zhi-Xiang Zhou, Xi-Shan Wang 
World J Gastroenterol 25(31):4502-4511. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4502
Systematic Reviews
Akwi W Asombang, Nathaniel Chishinga, Alick Nkhoma, Jackson Chipaila, Bright Nsokolo, Martha Manda-Mapalo, Joao Filipe G Montiero, Lewis Banda, Kulwinder S Dua 
World J Gastroenterol 25(31):4512-4533. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4512
Meta-Analysis
Davide Bellini, Flaminia Rivosecchi, Nicola Panvini, Marco Rengo, Damiano Caruso, Iacopo Carbone, Riccardo Ferrari, Pasquale Paolantonio, Andrea Laghi 
World J Gastroenterol 25(31):4555-4566. Published online Aug 21, 2019. doi: 10.3748/wjg.v25.i31.4555
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