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Open-Access Journal
Minireviews
Basic Study
Case Control Study
Yan-Ke Li, Qian Xu, Li-Ping Sun, Yue-Hua Gong, Jing-Jing Jing, Cheng-Zhong Xing, Yuan Yuan 
World J Gastroenterol 26(3):307-323. Published online Jan 21, 2020. doi: 10.3748/wjg.v26.i3.307
Retrospective Study
Gaël Stéphane Roth, Yann Teyssier, Mélodie Abousalihac, Arnaud Seigneurin, Julien Ghelfi, Christian Sengel, Thomas Decaens 
World J Gastroenterol 26(3):324-334. Published online Jan 21, 2020. doi: 10.3748/wjg.v26.i3.324
Observational Study
Bridget A Baxter, Kristopher D Parker, Michael J Nosler, Sangeeta Rao, Rebecca Craig, Catherine Seiler, Elizabeth P Ryan 
World J Gastroenterol 26(3):335-352. Published online Jan 21, 2020. doi: 10.3748/wjg.v26.i3.335
Systematic Reviews
Takumi Onoyama, Yohei Takeda, Taro Yamashita, Wataru Hamamoto, Yuri Sakamoto, Hiroki Koda, Soichiro Kawata, Kazuya Matsumoto, Hajime Isomoto 
World J Gastroenterol 26(3):353-365. Published online Jan 21, 2020. doi: 10.3748/wjg.v26.i3.353
Case Report
Nguyen Hai Nam, Kojiro Taura, Masashi Kanai, Keita Fukuyama, Norimitsu Uza, Hirona Maeda, Yojiro Yutaka, Toyofumi F Chen-Yoshikawa, Manabu Muto, Shinji Uemoto 
World J Gastroenterol 26(3):366-374. Published online Jan 21, 2020. doi: 10.3748/wjg.v26.i3.366
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