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Open-Access Journal
Review
Kosha J Mehta, Sebastien Je Farnaud, Paul A Sharp 
World J Gastroenterol 25(5):521-538. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.521
Minireviews
Tilemachos Koutouratsas, Theodora Kalli, Georgios Karamanolis, Maria Gazouli 
World J Gastroenterol 25(5):539-551. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.539
Kashif Mukhtar, Hasham Nawaz, Shahab Abid 
World J Gastroenterol 25(5):552-566. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.552
Basic Study
Rim Serhal, Nagib Saliba, George Hilal, Mayssam Moussa, Ghada S Hassan, Oula El Atat, Nada Alaaeddine 
World J Gastroenterol 25(5):567-583. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.567
Chang Xu, Kun Wang, Yu-Han Ding, Wen-Jing Li, Lei Ding 
World J Gastroenterol 25(5):584-599. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.584
Retrospective Cohort Study
Miroslav Vujasinovic, Aleksandra Hedström, Patrick Maisonneuve, Roberto Valente, Henrik von Horn, J-Matthias Löhr, Stephan L Haas 
World J Gastroenterol 25(5):600-607. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.600
Retrospective Study
Dong Kyun Kim, Bo Ra Kim, Jin Sook Jeong, Yang Hyun Baek 
World J Gastroenterol 25(5):608-621. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.608
Tong Zhang, Zi-Xing Huang, Yi Wei, Han-Yu Jiang, Jie Chen, Xi-Jiao Liu, Li-Kun Cao, Ting Duan, Xiao-Peng He, Chun-Chao Xia, Bin Song 
World J Gastroenterol 25(5):622-631. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.622
Systematic Reviews
Els Van de Vijver, Ann Van Gils, Laura Beckers, Yannick Van Driessche, Nicolette Dorien Moes, Patrick Ferry van Rheenen 
World J Gastroenterol 25(5):632-643. Published online Feb 7, 2019. doi: 10.3748/wjg.v25.i5.632
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