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Open-Access Journal
Editorial
Review
Minireviews
Basic Study
Hirohito Mori, Nobuya Kobayashi, Hideki Kobara, Noriko Nishiyama, Shintaro Fujihara, Taiga Chiyo, Maki Ayaki, Takashi Nagase, Tsutomu Masaki 
World J Gastroenterol 22(13):3558-3563. Published online Apr 7, 2016. doi: 10.3748/wjg.v22.i13.3558
Case Control Study
Yamilka Abreu-Delgado, Raymond A Isidro, Esther A Torres, Alexandra González, Myrella L Cruz, Angel A Isidro, Carmen I González-Keelan, Priscilla Medero, Caroline B Appleyard 
World J Gastroenterol 22(13):3581-3591. Published online Apr 7, 2016. doi: 10.3748/wjg.v22.i13.3581
Retrospective Cohort Study
Retrospective Study
Tilmann Graeter, Wolfgang Kratzer, Suemeyra Oeztuerk, Mark Martin Haenle, Richard Andrew Mason, Andreas Hillenbrand, Thomas Kull, Thomas F Barth, Peter Kern, Beate Gruener 
World J Gastroenterol 22(13):3621-3631. Published online Apr 7, 2016. doi: 10.3748/wjg.v22.i13.3621
Clinical Trials Study
Quirijn R J G Tummers, Leonora S F Boogerd, Wobbe O de Steur, Floris P R Verbeek, Martin C Boonstra, Henricus J M Handgraaf, John V Frangioni, Cornelis J H van de Velde, Henk H Hartgrink, Alexander L Vahrmeijer 
World J Gastroenterol 22(13):3644-3651. Published online Apr 7, 2016. doi: 10.3748/wjg.v22.i13.3644
Observational Study
Prospective Study
Meta-Analysis
Case Report