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Open-Access Journal
Opinion Review
Paula Assumpção, Taíssa Araújo, André Khayat, Geraldo Ishak, Sidney Santos, Williams Barra, João Felipe Acioli, Benedito Rossi, Paulo Assumpção 
World J Gastroenterol 26(13):1382-1393. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1382
Review
Florian Bürtin, Christina S Mullins, Michael Linnebacher 
World J Gastroenterol 26(13):1394-1426. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1394
Minireviews
Masaya Iwamuro, Haruo Urata, Takehiro Tanaka, Hiroyuki Okada 
World J Gastroenterol 26(13):1439-1449. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1439
Basic Study
Ru-Jia Xie, Xiao-Xia Hu, Lu Zheng, Shuang Cai, Yu-Si Chen, Yi Yang, Ting Yang, Bing Han, Qin Yang 
World J Gastroenterol 26(13):1450-1462. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1450
Clinical and Translational Research
Satoyoshi Yamashita, Akira Kato, Toshitaka Akatsuka, Takashi Sawada, Tomohide Asai, Noriyuki Koyama, Kiwamu Okita 
World J Gastroenterol 26(13):1463-1473. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1463
Case Control Study
Retrospective Study
Shun Zhang, Hajime Orita, Hiroyuki Egawa, Ryota Matsui, Suguru Yamauchi, Yukinori Yube, Sanae Kaji, Toru Takahashi, Shinichi Oka, Noriyuki Inaki, Tetsu Fukunaga 
World J Gastroenterol 26(13):1490-1500. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1490
Observational Study
Estephany Abou Jokh Casas, Virginia Pubul Núñez, Urbano Anido-Herranz, María del Carmen Mallón Araujo, Maria del Carmen Pombo Pasín, Miguel Garrido Pumar, José Manuel Cabezas Agrícola, José Manuel Cameselle-Teijeiro, Ashraf Hilal, Álvaro Ruibal Morell 
World J Gastroenterol 26(13):1513-1524. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1513
Case Report
Nian-Jun Xiao, Shou-Bin Ning, Teng Li, Bai-Rong Li, Tao Sun 
World J Gastroenterol 26(13):1540-1545. Published online Apr 7, 2020. doi: 10.3748/wjg.v26.i13.1540
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