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Open-Access Journal
Opinion Review
Review
Laura Necula, Lilia Matei, Denisa Dragu, Ana I Neagu, Cristina Mambet, Saviana Nedeianu, Coralia Bleotu, Carmen C Diaconu, Mihaela Chivu-Economescu 
World J Gastroenterol 25(17):2029-2044. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2029
Minireviews
Basic Study
Retrospective Study
Xue Yang, Zhi-Jie Xu, Xi Chen, Shuang-Shuang Zeng, Long Qian, Jie Wei, Mei Peng, Xiang Wang, Wan-Li Liu, Hong-Ying Ma, Zhi-Cheng Gong, Yuan-Liang Yan 
World J Gastroenterol 25(17):2099-2109. Published online May 7, 2019. doi: 10.3748/wjg.v25.i17.2099
Clinical Trials Study
Observational Study
Case Report