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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
Minireviews
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
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