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Open-Access Journal
Editorial
Giuseppe Verlato, Daniele Marrelli, Simone Accordini, Maria Bencivenga, Alberto Di Leo, Alberto Marchet, Roberto Petrioli, Giacomo Zoppini, Michele Muggeo, Franco Roviello, Giovanni de Manzoni 
World J Gastroenterol 21(21):6434-6443. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6434
Topic Highlight
Review
Minireviews
Rodolfo Sacco, Valeria Mismas, Sara Marceglia, Antonio Romano, Luca Giacomelli, Marco Bertini, Graziana Federici, Salvatore Metrangolo, Giuseppe Parisi, Emanuele Tumino, Giampaolo Bresci, Ambra Corti, Manuel Tredici, Michele Piccinno, Luigi Giorgi, Carlo Bartolozzi, Irene Bargellini 
World J Gastroenterol 21(21):6518-6525. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6518
Basic Study
Case Control Study
Retrospective Cohort Study
Retrospective Study
Clinical Trials Study
Munetaka Nakamura, Jun Nishikawa, Kouichi Hamabe, Atsushi Goto, Junichi Nishimura, Hiroaki Shibata, Misato Nagao, Sho Sasaki, Shinichi Hashimoto, Takeshi Okamoto, Isao Sakaida 
World J Gastroenterol 21(21):6706-6712. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6706
Observational Study
Prospective Study
Zsuzsanna Kurti, Barbara D Lovasz, Michael D Mandel, Zoltan Csima, Petra A Golovics, Bence D Csako, Anna Mohas, Lorant Gönczi, Krisztina B Gecse, Lajos S Kiss, Miklos Szathmari, Peter L Lakatos 
World J Gastroenterol 21(21):6728-6735. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6728
Systematic Reviews
Clotilde Fuentes-Orozco, Carlos Dávalos-Cobián, Jesús García-Correa, Gabriela Ambriz-González, Michel Dassaejv Macías-Amezcua, Jesús García-Rentería, Jorge Rendón-Félix, Mariana Chávez-Tostado, Lizbeth Araceli Cuesta-Márquez, Andrea Socorro Alvarez-Villaseñor, Ana Olivia Cortés-Flores, Alejandro González-Ojeda 
World J Gastroenterol 21(21):6745-6753. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6745
Case Report
Hiromichi Ishii, Akinori Noguchi, Mie Onishi, Koji Takao, Takahiro Maruyama, Hiroaki Taiyoh, Yasunobu Araki, Takeshi Shimizu, Hiroyuki Izumi, Naoki Tani, Masahide Yamaguchi, Tetsuro Yamane 
World J Gastroenterol 21(21):6754-6758. Published online Jun 7, 2015. doi: 10.3748/wjg.v21.i21.6754