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Open-Access Journal
Frontier
Glauber Rocha Lima Araújo, Hanna Santos Marques, Maria Luísa Cordeiro Santos, Filipe Antônio França da Silva, Breno Bittencourt da Brito, Gabriel Lima Correa Santos, Fabrício Freire de Melo 
World J Gastroenterol 28(4):402-411. Published online Jan 28, 2022. doi: 10.3748/wjg.v28.i4.402
Review
Eline Margrete Randulff Hillestad, Aina van der Meeren, Bharat Halandur Nagaraja, Ben René Bjørsvik, Noman Haleem, Alfonso Benitez-Paez, Yolanda Sanz, Trygve Hausken, Gülen Arslan Lied, Arvid Lundervold, Birgitte Berentsen 
World J Gastroenterol 28(4):412-431. Published online Jan 28, 2022. doi: 10.3748/wjg.v28.i4.412
Minireviews
Basic Study
Letter to the Editor
Ivan Ranković, Vladimir Milivojević, Aleksandra Pavlović Marković, Mihailo Bezmarević 
World J Gastroenterol 28(4):497-499. Published online Jan 28, 2022. doi: 10.3748/wjg.v28.i4.497