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Opinion Review
Review
Minireviews
Rossella Gioco, Daniela Corona, Burcin Ekser, Lidia Puzzo, Gaetano Inserra, Flavia Pinto, Chiara Schipa, Francesca Privitera, Pierfrancesco Veroux, Massimiliano Veroux 
World J Gastroenterol 26(38):5797-5811. Published online Oct 14, 2020. doi: 10.3748/wjg.v26.i38.5797
Basic Study
Case Control Study
Sigita Gelman, Andrius Sakalauskas, Romanas Zykus, Andrius Pranculis, Rytis Jurkonis, Irma Kuliavienė, Arūnas Lukoševičius, Limas Kupčinskas, Juozas Kupčinskas 
World J Gastroenterol 26(38):5836-5848. Published online Oct 14, 2020. doi: 10.3748/wjg.v26.i38.5836
Retrospective Study
Observational Study
Meta-Analysis