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Review
Basic Study
Xue-Yang Chen, Chang-Zhou Cai, Meng-Li Yu, Ze-Min Feng, Yu-Wei Zhang, Pei-Hao Liu, Hang Zeng, Chao-Hui Yu 
World J Gastroenterol 25(45):6607-6618. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6607
Yong-Wei Xu, Rui-Xin Xing, Wen-Hui Zhang, Lu Li, Yi Wu, Jing Hu, Cong Wang, Qing-Li Luo, Ji-Long Shen, Xi Chen 
World J Gastroenterol 25(45):6634-6652. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6634
Yi-Fan Ren, Meng-Zhou Wang, Jian-Bin Bi, Jia Zhang, Lin Zhang, Wu-Ming Liu, Sha-Sha Wei, Yi Lv, Zheng Wu, Rong-Qian Wu 
World J Gastroenterol 25(45):6653-6667. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6653
Retrospective Cohort Study
Xin-Xing Tantai, Na Liu, Long-Bao Yang, Zhong-Cao Wei, Cai-Lan Xiao, Ya-Hua Song, Jin-Hai Wang 
World J Gastroenterol 25(45):6668-6680. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6668
Observational Study
Ai Zhao, Mei-Chen Wang, Ignatius Man-Yau Szeto, Li-Ping Meng, Yan Wang, Ting Li, Yu-Mei Zhang 
World J Gastroenterol 25(45):6681-6692. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6681
Case Report
Hai-Lan Li, Hua-Ping Liu, Grace Wen-Jun Guo, Zhi-Hong Chen, Fu-Qing Zhou, Peng Liu, Jian-Bin Liu, Ren Wan, Zhi-Qun Mao 
World J Gastroenterol 25(45):6693-6703. Published online Dec 7, 2019. doi: 10.3748/wjg.v25.i45.6693
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