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Open-Access Journal
Opinion Review
Review
Marco Bernardi, Anna Lucia Fedullo, Elisabetta Bernardi, Diego Munzi, Ilaria Peluso, Jonathan Myers, Florigio Romano Lista, Tommaso Sciarra 
World J Gastroenterol 26(20):2479-2497. Published online May 28, 2020. doi: 10.3748/wjg.v26.i20.2479
Minireviews
Basic Study
Karen Chiam, George C Mayne, Tingting Wang, David I Watson, Tanya S Irvine, Tim Bright, Lorelle T Smith, Imogen A Ball, Joanne M Bowen, Dorothy M Keefe, Sarah K Thompson, Damian J Hussey 
World J Gastroenterol 26(20):2570-2583. Published online May 28, 2020. doi: 10.3748/wjg.v26.i20.2570
Marçal Yll, Maria Francesca Cortese, Mercedes Guerrero-Murillo, Gerard Orriols, Josep Gregori, Rosario Casillas, Carolina González, Sara Sopena, Cristina Godoy, Marta Vila, David Tabernero, Josep Quer, Ariadna Rando, Rosa Lopez-Martinez, Rafael Esteban, Mar Riveiro-Barciela, Maria Buti, Francisco Rodríguez-Frías 
World J Gastroenterol 26(20):2584-2598. Published online May 28, 2020. doi: 10.3748/wjg.v26.i20.2584
Clinical and Translational Research
Chiko Sato, Kingo Hirasawa, Yoko Tateishi, Yuichiro Ozeki, Atsushi Sawada, Ryosuke Ikeda, Takehide Fukuchi, Masafumi Nishio, Ryosuke Kobayashi, Makomo Makazu, Hiroaki Kaneko, Yoshiaki Inayama, Shin Maeda 
World J Gastroenterol 26(20):2618-2631. Published online May 28, 2020. doi: 10.3748/wjg.v26.i20.2618
Case Control Study
Retrospective Study
Prospective Study
Davide Ippolito, Silvia Girolama Drago, Anna Pecorelli, Cesare Maino, Giulia Querques, Ilaria Mariani, Cammillo Talei Franzesi, Sandro Sironi 
World J Gastroenterol 26(20):2657-2668. Published online May 28, 2020. doi: 10.3748/wjg.v26.i20.2657
Systematic Reviews