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Open-Access Journal
Basic Study
Case Control Study
Caroline de Matos Lourenço, Manoela Dias Susi, Mariah Cristina Antunes do Nascimento, Vilson Serafim Junior, Ana Paula Simedan Vila, Gabriela Helena Rodrigues-Flemming, Eny Maria Goloni-Bertollo, Ana Elizabete Silva, Juliana Garcia de Oliveira-Cucolo 
World J Gastrointest Oncol 12(5):535-548. Published online May 15, 2020. doi: 10.4251/wjgo.v12.i5.535
Retrospective Cohort Study
Retrospective Study
Roman Yarema, Мyron Оhorchak, Petro Hyrya, Yuriy Kovalchuk, Victor Safiyan, Ivan Karelin, Severyn Ferneza, Markiyan Fetsych, Myron Matusyak, Yuriy Oliynyk, Тaras Fetsych 
World J Gastrointest Oncol 12(5):569-581. Published online May 15, 2020. doi: 10.4251/wjgo.v12.i5.569
Observational Study
Milica Stojkovic Lalosevic, Tamara Milovanovic, Marjan Micev, Mirjana Stojkovic, Sanja Dragasevic, Milos Stulic, Ivan Rankovic, Vladimir Dugalic, Zoran Krivokapic, Aleksandra Pavlovic Markovic 
World J Gastrointest Oncol 12(5):592-600. Published online May 15, 2020. doi: 10.4251/wjgo.v12.i5.592
Letter To The Editor