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Open-Access Journal
Editorial
Cristiane Valle Tovo, Angelo Zambam de Mattos, Gabriela Perdomo Coral, Fernanda Schild Branco, Eiji Suwa, Angelo Alves de Mattos 
World J Gastroenterol 21(15):4432-4439. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4432
Therapeutics Advances
Topic Highlight
Review
Basic Study
Elke Kaemmerer, Paula Kuhn, Ursula Schneider, Min Kyung Jeon, Christina Klaus, Miriam Schiffer, Danika Weisner, Christian Liedtke, Jörg Jäkel, Lieven Nils Kennes, Ralf-Dieter Hilgers, Norbert Wagner, Nikolaus Gassler 
World J Gastroenterol 21(15):4499-4508. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4499
Min Li, Qi Wang, Shun-Ai Liu, Jin-Qian Zhang, Wei Ju, Min Quan, Sheng-Hu Feng, Jin-Ling Dong, Ping Gao, Jun Cheng 
World J Gastroenterol 21(15):4517-4525. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4517
Retrospective Study
Tsutomu Kanefuji, Toru Takano, Takeshi Suda, Kouhei Akazawa, Takeshi Yokoo, Hiroteru Kamimura, Kenya Kamimura, Atsunori Tsuchiya, Masaaki Takamura, Hirokazu Kawai, Satoshi Yamagiwa, Hidefumi Aoyama, Minoru Nomoto, Shuji Terai 
World J Gastroenterol 21(15):4583-4591. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4583
Clinical Trials Study
Observational Study
Juan C Andreu-Ballester, Rafael Gil-Borrás, Carlos García-Ballesteros, Ignacio Catalán-Serra, Victoria Amigo, Virgina Fernández-Fígares, Carmen Cuéllar 
World J Gastroenterol 21(15):4666-4672. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4666
Prospective Study
Randomized Controlled Trial
Systematic Reviews
Mohan Ramchandani, Duvvur Nageshwar Reddy, Sundeep Lakhtakia, Manu Tandan, Amit Maydeo, Thoguluva Seshadri Chandrashekhar, Ajay Kumar, Randhir Sud, Rungsun Rerknimitr, Dadang Makmun, Christopher Khor 
World J Gastroenterol 21(15):4722-4734. Published online Apr 21, 2015. doi: 10.3748/wjg.v21.i15.4722
SYSTEMATIC REVIEWS
Meta-Analysis
Case Report
Letters To The Editor