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Open-Access Journal
Editorial
Riccardo De Robertis, Paolo Tinazzi Martini, Emanuele Demozzi, Gino Puntel, Silvia Ortolani, Sara Cingarlini, Andrea Ruzzenente, Alfredo Guglielmi, Giampaolo Tortora, Claudio Bassi, Paolo Pederzoli, Mirko D’Onofrio 
World J Gastroenterol 21(22):6794-6808. Published online Jun 14, 2015. doi: 10.3748/wjg.v21.i22.6794
Topic Highlight
Review
Basic Study
Case Control Study
Retrospective Cohort Study
Retrospective Study
Clinical Trials Study
Nora Sipeki, Laszlo Davida, Eszter Palyu, Istvan Altorjay, Jolan Harsfalvi, Peter Antal Szalmas, Zoltan Szabo, Gabor Veres, Zakera Shums, Gary L Norman, Peter L Lakatos, Maria Papp 
World J Gastroenterol 21(22):6952-6964. Published online Jun 14, 2015. doi: 10.3748/wjg.v21.i22.6952
Observational Study
Marcos Ricardo da Silva Rodrigues, Marco Aurelio Santo, Giovani Marino Favero, Elaine Cristina Vieira, Roberto Ferreira Artoni, Viviane Nogaroto, Egberto Gaspar de Moura, Patricia Lisboa, Fabio Quirillo Milleo 
World J Gastroenterol 21(22):6990-6998. Published online Jun 14, 2015. doi: 10.3748/wjg.v21.i22.6990
Prospective Study
Randomized Controlled Trial
Systematic Reviews
Meta-Analysis
Case Report