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Open-Access Journal
Review
Tarun Sahu, Arundhati Mehta, Yashwant Kumar Ratre, Akriti Jaiswal, Naveen Kumar Vishvakarma, Lakkakula Venkata Kameswara Subrahmanya Bhaskar, Henu Kumar Verma 
World J Gastroenterol 27(6):449-469. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.449
Basic Study
Peng Deng, Ming Sun, Wen-Yan Zhao, Bin Hou, Kai Li, Tao Zhang, Feng Gu 
World J Gastroenterol 27(6):487-500. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.487
Retrospective Cohort Study
Li-Qi Sun, Li-Si Peng, Jie-Fang Guo, Fei Jiang, Fang Cui, Hao-Jie Huang, Zhen-Dong Jin 
World J Gastroenterol 27(6):501-512. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.501
Retrospective Study
Ya-Mei Zheng, Xian-Yun Chen, Jie-Yi Cai, Yu Yuan, Wen-Rui Xie, Jia-Ting Xu, Harry Hua-Xiang Xia, Min Zhang, Xing-Xiang He, Li-Hao Wu 
World J Gastroenterol 27(6):513-522. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.513
Prospective Study
Jasbir Makker, Hassan Tariq, Kishore Kumar, Madhavi Ravi, Danial Haris Shaikh, Vivien Leung, Umar Hayat, Muhammad T Hassan, Harish Patel, Suresh Nayudu, Sridhar Chilimuri 
World J Gastroenterol 27(6):523-533. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.523
Case Report
Masahiro Yura, Kiminori Takano, Kiyohiko Adachi, Asuka Hara, Keita Hayashi, Yuki Tajima, Yasushi Kaneko, Yoichiro Ikoma, Hiroto Fujisaki, Akira Hirata, Kumiko Hongo, Kikuo Yo, Kimiyasu Yoneyama, Reiko Dehari, Kazuo Koyanagi, Motohito Nakagawa 
World J Gastroenterol 27(6):534-544. Published online Feb 14, 2021. doi: 10.3748/wjg.v27.i6.534
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