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Opinion Review
Review
Basic Study
Clinical and Translational Research
Retrospective Cohort Study
Barbora Packova, Petra Kovalcikova, Zdenek Pavlovsky, Daniel Bartusek, Jitka Prokesova, Jiri Dolina, Radek Kroupa 
World J Gastroenterol 26(26):3780-3791. Published online Jul 14, 2020. doi: 10.3748/wjg.v26.i26.3780
Retrospective Study
Sinem Cil Gonulcu, Betul Unal, Ibrahim Cumhur Bassorgun, Mualla Ozcan, Hasan Senol Coskun, Gulsum Ozlem Elpek 
World J Gastroenterol 26(26):3814-3833. Published online Jul 14, 2020. doi: 10.3748/wjg.v26.i26.3814
Observational Study
Alba Panarese, Giovanni Galatola, Raffaele Armentano, Pedro Pimentel-Nunes, Enzo Ierardi, Maria Lucia Caruso, Francesco Pesce, Marco Vincenzo Lenti, Valeria Palmitessa, Sergio Coletta, Endrit Shahini 
World J Gastroenterol 26(26):3834-3850. Published online Jul 14, 2020. doi: 10.3748/wjg.v26.i26.3834