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Open-Access Journal
Frontier
Ramesh Kumar, Rajeev Nayan Priyadarshi, Utpal Anand 
World J Gastroenterol 27(11):990-1005. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.990
Review
Dorota Zarębska-Michaluk 
World J Gastroenterol 27(11):1006-1021. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1006
Júlio Maria Fonseca Chebli, Natália Sousa Freitas Queiroz, Adérson Omar Mourão Cintra Damião, Liliana Andrade Chebli, Márcia Henriques de Magalhães Costa, Rogério Serafim Parra 
World J Gastroenterol 27(11):1022-1042. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1022
Retrospective Study
Takuya Satomi, Seiji Kawano, Tomoki Inaba, Masahiro Nakagawa, Hirokazu Mouri, Masao Yoshioka, Shoichi Tanaka, Tatsuya Toyokawa, Sayo Kobayashi, Takehiro Tanaka, Hiromitsu Kanzaki, Masaya Iwamuro, Yoshiro Kawahara, Hiroyuki Okada 
World J Gastroenterol 27(11):1043-1054. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1043
Mei Zhang, Shuang Yang, Xiao-Cui Li, Hong-Ming Zhu, Ding Peng, Bang-Yi Li, Tian-Xu Jia, Chen Tian 
World J Gastroenterol 27(11):1055-1063. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1055
Observational Study
José Carlos Rodrigues Nascimento, Lianna C Pereira, Juliana Magalhães C Rêgo, Ronaldo P Dias, Paulo Goberlânio B Silva, Silvio Alencar C Sobrinho, Gustavo R Coelho, Ivelise Regina C Brasil, Edmilson F Oliveira-Filho, James S Owen, Pierluigi Toniutto, Reinaldo B Oriá 
World J Gastroenterol 27(11):1064-1075. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1064
Shan-Shan Gong, Yi-Hong Fan, Bin Lv, Mie-Qing Zhang, Yi Xu, Jing Zhao 
World J Gastroenterol 27(11):1076-1089. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1076
Clinical Trials Study
Waled Mohsen, Astrid-Jane Williams, Gabrielle Wark, Alexandra Sechi, Jenn-Hian Koo, Wei Xuan, Milan Bassan, Watson Ng, Susan Connor 
World J Gastroenterol 27(11):1090-1100. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1090
Xiao-Yan Jiang, Bing Huang, Dan-Ping Huang, Chun-Shan Wei, Wei-Chao Zhong, De-Ti Peng, Fu-Rong Huang, Guang-Dong Tong 
World J Gastroenterol 27(11):1101-1116. Published online Mar 21, 2021. doi: 10.3748/wjg.v27.i11.1101
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