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Open-Access Journal
Frontier
Linda Calistri, Vieri Rastrelli, Cosimo Nardi, Davide Maraghelli, Sofia Vidali, Michele Pietragalla, Stefano Colagrande 
World J Gastroenterol 27(46):7866-7893. Published online Dec 14, 2021. doi: 10.3748/wjg.v27.i46.7866
Review
Minireviews
Michelle R Goulart, Konstantinos Stasinos, Rachel Elizabeth Ann Fincham, Francesca R Delvecchio, Hemant M Kocher 
World J Gastroenterol 27(46):7956-7968. Published online Dec 14, 2021. doi: 10.3748/wjg.v27.i46.7956
Abhishek Bhurwal, Carlos D Minacapelli, Evan Orosz, Kapil Gupta, Christopher Tait, Ishita Dalal, Clark Zhang, Eric Zhao, Vinod K Rustgi 
World J Gastroenterol 27(46):7969-7981. Published online Dec 14, 2021. doi: 10.3748/wjg.v27.i46.7969
Basic Study
Retrospective Cohort Study
Muhammad Umair Khan, Kamran Mushtaq, Deema Hussam Alsoub, Phool Iqbal, Fateen Ata, Hammad Shabir Chaudhry, Fatima Iqbal, Girisha Balaraju, Muna A Al Maslamani, Betsy Varughese, Rajvir Singh, Khalid Al Ejji, Saad Al Kaabi, Yasser Medhat Kamel, Adeel Ajwad Butt 
World J Gastroenterol 27(46):7995-8009. Published online Dec 14, 2021. doi: 10.3748/wjg.v27.i46.7995
Shinichi Kinami, Naohiko Nakamura, Tomoharu Miyashita, Hidekazu Kitakata, Sachio Fushida, Takashi Fujimura, Yasuo Iida, Noriyuki Inaki, Toru Ito, Hiroyuki Takamura 
World J Gastroenterol 27(46):8010-8030. Published online Dec 14, 2021. doi: 10.3748/wjg.v27.i46.8010
Correction
Letter to the Editor