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Open-Access Journal
Review
Basic Study
Alessia Di Silvestre, Marianna Lucafò, Letizia Pugnetti, Matteo Bramuzzo, Gabriele Stocco, Egidio Barbi, Giuliana Decorti 
World J Gastroenterol 25(39):5918-5925. Published online Oct 21, 2019. doi: 10.3748/wjg.v25.i39.5918
Mohamed T Khayyal, Walaa Wadie, Enas A Abd El-Haleim, Kawkab A Ahmed, Olaf Kelber, Ramy M Ammar, Heba Abdel-Aziz 
World J Gastroenterol 25(39):5926-5935. Published online Oct 21, 2019. doi: 10.3748/wjg.v25.i39.5926
Dong Do You, Suk Joon Cho, Ok-Hee Kim, Jin Sook Song, Kyu-Seok Hwang, Sang Chul Lee, Kee-Hwan Kim, Ho Joong Choi, Ha-Eun Hong, Haeyeon Seo, Tae Ho Hong, Jung Hyun Park, Tae Yoon Lee, Joseph Ahn, Jae-Kyung Jung, Kwan-Young Jung, Say-June Kim 
World J Gastroenterol 25(39):5936-5952. Published online Oct 21, 2019. doi: 10.3748/wjg.v25.i39.5936
Retrospective Study
Melissa Frizziero, Xin Wang, Bipasha Chakrabarty, Alexa Childs, Tu V Luong, Thomas Walter, Mohid S Khan, Meleri Morgan, Adam Christian, Mona Elshafie, Tahir Shah, Annamaria Minicozzi, Wasat Mansoor, Tim Meyer, Angela Lamarca, Richard A Hubner, Juan W Valle, Mairéad G McNamara 
World J Gastroenterol 25(39):5991-6005. Published online Oct 21, 2019. doi: 10.3748/wjg.v25.i39.5991
Systematic Review
Meta-Analysis