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Open-Access Journal
Opinion Review
Juan Manuel Sánchez-Hidalgo, Lidia Rodríguez-Ortiz, Álvaro Arjona-Sánchez, Sebastián Rufián-Peña, Ángela Casado-Adam, Antonio Cosano-Álvarez, Javier Briceño-Delgado 
World J Gastroenterol 25(27):3484-3502. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3484
Review
Tian-Yang Li, Yang Yang, Guo Zhou, Zheng-Kun Tu 
World J Gastroenterol 25(27):3527-3537. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3527
Minireviews
Markus Schneider, Jörg Höllerich, Torsten Beyna 
World J Gastroenterol 25(27):3538-3545. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3538
Kevin Ka Wan Chu, Kenneth Siu Ho Chok 
World J Gastroenterol 25(27):3563-3571. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3563
Basic Study
Sandra Vidal-Lletjós, Mireille Andriamihaja, Anne Blais, Marta Grauso, Patricia Lepage, Anne-Marie Davila, Claire Gaudichon, Marion Leclerc, François Blachier, Annaïg Lan 
World J Gastroenterol 25(27):3572-3589. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3572
Meng-Ting Liu, Ying-Juan Huang, Ting-Ying Zhang, Lun-Bo Tan, Xi-Feng Lu, Jian Qin 
World J Gastroenterol 25(27):3590-3606. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3590
Retrospective Cohort Study
Federico Piñero, Sebastián Marciano, Nora Fernández, Jorge Silva, Margarita Anders, Alina Zerega, Ezequiel Ridruejo, Gustavo Romero, Beatriz Ameigeiras, Claudia D’Amico, Luis Gaite, Carla Bermúdez, Virginia Reggiardo, Luis Colombato, Adrián Gadano, Marcelo Silva 
World J Gastroenterol 25(27):3607-3618. Published online Jul 21, 2019. doi: 10.3748/wjg.v25.i27.3607
Retrospective Study
Systematic Reviews
Meta-Analysis
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