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Open-Access Journal
Opinion Review
Abhinav Vasudevan, David H Bruining, Edward V Loftus Jr, William Faubion, Eric C Ehman, Laura Raffals 
World J Gastroenterol 27(25):3693-3704. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3693
Review
Albert J Czaja 
World J Gastroenterol 27(25):3705-3733. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3705
Yu Yang, Yu-Xuan Li, Ren-Qi Yao, Xiao-Hui Du, Chao Ren 
World J Gastroenterol 27(25):3734-3747. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3734
Marko Kumric, Tina Ticinovic Kurir, Dinko Martinovic, Piero Marin Zivkovic, Josko Bozic 
World J Gastroenterol 27(25):3748-3761. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3748
Georgios Axiaris, Evanthia Zampeli, Spyridon Michopoulos, Giorgos Bamias 
World J Gastroenterol 27(25):3762-3779. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3762
Minireviews
Riccardo Inchingolo, Fabrizio Acquafredda, Michele Tedeschi, Letizia Laera, Gianmarco Surico, Alessia Surgo, Alba Fiorentino, Stavros Spiliopoulos, Nicola de’Angelis, Riccardo Memeo 
World J Gastroenterol 27(25):3780-3789. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3780
Qiao Zhan, Jing-Hang Xu, Yan-Yan Yu, Emily Lo KK, Felicianna, Hani El-Nezami, Zheng Zeng 
World J Gastroenterol 27(25):3790-3801. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3790
Anna Di Sessa, Simona Riccio, Emilia Pirozzi, Martina Verde, Antonio Paride Passaro, Giuseppina Rosaria Umano, Stefano Guarino, Emanuele Miraglia del Giudice, Pierluigi Marzuillo 
World J Gastroenterol 27(25):3815-3824. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3815
Bing-Nan Liu, Xiao-Tong Liu, Zi-Han Liang, Ji-Hui Wang 
World J Gastroenterol 27(25):3837-3850. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3837
Basic Study
You-Han Miao, Li-Ping Mao, Xiao-Juan Cai, Xiao-Ying Mo, Qi-Qi Zhu, Fei-Tong Yang, Mei-Hua Wang 
World J Gastroenterol 27(25):3851-3862. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3851
Retrospective Cohort Study
Sonali Palchaudhuri, Ishita Dhawan, Afshin Parsikia, Edo Y Birati, Joyce Wald, Shazia Mehmood Siddique, Laurel R Fisher 
World J Gastroenterol 27(25):3877-3887. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3877
Retrospective Study
Guo-Lian Gan, Hua-Tao Wu, Wen-Jia Chen, Chun-Lan Li, Qian-Qian Ye, Yi-Feng Zheng, Jing Liu 
World J Gastroenterol 27(25):3888-3900. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3888
Chang Sin Lee, Se-Jin Baek, Jung-Myun Kwak, Jin Kim, Seon-Hahn Kim 
World J Gastroenterol 27(25):3901-3912. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3901
Observational Study
Meta-Analysis
Xiong Chang Lim, Kameswara Rishi Yeshayahu Nistala, Cheng Han Ng, Snow Yunni Lin, Darren Jun Hao Tan, Khek-Yu Ho, Choon-Seng Chong, Mark Muthiah 
World J Gastroenterol 27(25):3925-3939. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3925
Case Report
Letter to the Editor
Chao-Ming Hung, Po-Huang Lee, Hui-Ming Lee, Chong-Chi Chiu 
World J Gastroenterol 27(25):3948-3950. Published online Jul 7, 2021. doi: 10.3748/wjg.v27.i25.3948
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