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Open-Access Journal
Review
Minireviews
Saurabh Kedia, Prasenjit Das, Kumble Seetharama Madhusudhan, Siddhartha Dattagupta, Raju Sharma, Peush Sahni, Govind Makharia, Vineet Ahuja 
World J Gastroenterol 25(4):418-432. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.418
Basic Study
Patricia Prieto, Rafael I Jaén, Daniel Calle, María Gómez-Serrano, Estefanía Núñez, María Fernández-Velasco, Paloma Martín-Sanz, Sergio Alonso, Jesús Vázquez, Sebastián Cerdán, Miguel Ángel Peinado, Lisardo Boscá 
World J Gastroenterol 25(4):433-446. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.433
Retrospective Cohort Study
David Karsenti, Gaelle Tharsis, Pascal Burtin, Franck Venezia, Gilles Tordjman, Agnès Gillet, Joelle Samama, Karine Nahon-Uzan, Philippe Cattan, Maryan Cavicchi 
World J Gastroenterol 25(4):447-456. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.447
Retrospective Study
Mi Jung Kwon, Ho Suk Kang, Hyeon Tae Kim, Jin Woo Choo, Bo Hyun Lee, Sung Eun Hong, Kun Ha Park, Dong Min Jung, Hyun Lim, Jae Seung Soh, Sung Hoon Moon, Jong Hyeok Kim, Hye-Rim Park, Soo Kee Min, Jin won Seo, Ji-Young Choe 
World J Gastroenterol 25(4):469-484. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.469
Xiao-Dong Zhou, Qiao-Feng Chen, Yuan-Yuan Zhang, Ming-Ju Yu, Chang Zhong, Zhi-Jian Liu, Guo-Hua Li, Xiao-Jiang Zhou, Jun-Bo Hong, You-Xiang Chen 
World J Gastroenterol 25(4):485-497. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.485
Observational Study
Fabian Emura, Rene Gomez-Esquivel, Carlos Rodriguez-Reyes, Petros Benias, Javier Preciado, Michael Wallace, Luis Giraldo-Cadavid 
World J Gastroenterol 25(4):498-508. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.498
Marco Biolato, Fiorella Manca, Giuseppe Marrone, Consuelo Cefalo, Simona Racco, Giacinto A Miggiano, Venanzio Valenza, Antonio Gasbarrini, Luca Miele, Antonio Grieco 
World J Gastroenterol 25(4):509-520. Published online Jan 28, 2019. doi: 10.3748/wjg.v25.i4.509