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Open-Access Journal
Editorial
Topic Highlight
Review
Liliana Chiorean, Dagmar Schreiber-Dietrich, Barbara Braden, Xin-Wu Cui, Reiner Buchhorn, Jian-Min Chang, Christoph F Dietrich 
World J Gastroenterol 21(17):5231-5241. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5231
Basic Study
Kurodo Koshino, Nobuo Kanai, Masayuki Yamato, Teruo Okano, Masakazu Yamamoto 
World J Gastroenterol 21(17):5242-5249. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5242
Retrospective Study
Rui-Tao Wang, Ling-Qiang Zhang, Yi-Ping Mu, Jian-Bo Li, Xin-Sen Xu, Qing Pang, Lian-Kang Sun, Xing Zhang, Shun-Bin Dong, Lin Wang, Chang Liu 
World J Gastroenterol 21(17):5303-5310. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5303
Prospective Study
Daniel Trabulo, Suzane Ribeiro, Cláudio Martins, Cristina Teixeira, Cláudia Cardoso, João Mangualde, Ricardo Freire, Élia Gamito, Ana L Alves, Fátima Augusto, Ana P Oliveira, Isabelle Cremers 
World J Gastroenterol 21(17):5320-5327. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5320
Jan Martinek, Jana Maluskova, Magdalena Stefanova, Inna Tuckova, Stepan Suchanek, Zuzana Vackova, Jana Krajciova, Marek Kollar, Miroslav Zavoral, Julius Spicak 
World J Gastroenterol 21(17):5328-5335. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5328
Xu-Ren Sun, Zhe Sun, Zhi Zhu, Hai-Xia Guan, Chen-Yan Li, Jun-Yan Zhang, Yi-Ning Zhang, Huan Zhou, Hui-Jing Zhang, Hui-Mian Xu, Ming-Jun Sun 
World J Gastroenterol 21(17):5336-5344. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5336
Randomized Clinical Trial
Aflah Roohullah, Hui-Li Wong, Katrin M Sjoquist, Peter Gibbs, Kathryn Field, Ben Tran, Jeremy Shapiro, Joe Mckendrick, Desmond Yip, Louise Nott, Val Gebski, Weng Ng, Wei Chua, Timothy Price, Niall Tebbutt, Lorraine Chantrill 
World J Gastroenterol 21(17):5352-5358. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5352
Systematic Reviews
Noortje G Rossen, John K MacDonald, Elisabeth M de Vries, Geert R D'Haens, Willem M de Vos, Erwin G Zoetendal, Cyriel Y Ponsioen 
World J Gastroenterol 21(17):5359-5371. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5359
Meta-Analysis
Case Report
Sabela Lens, Jose L Calleja, Ana Campillo, Jose A Carrión, Teresa Broquetas, Christie Perello, Juan de la Revilla, Zoe Mariño, María-Carlota Londoño, Jose M Sánchez-Tapias, Álvaro Urbano-Ispizua, Xavier Forns 
World J Gastroenterol 21(17):5421-5426. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5421
Srbislav Knezevic, Igor Ignjatovic, Snezana Lukic, Slavko Matic, Vladimir Dugalic, Djordje Knezevic, Marjan Micev, Sanja Dragasevic 
World J Gastroenterol 21(17):5427-5431. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5427
Toshiya Maebayashi, Katsumi Abe, Takuya Aizawa, Masakuni Sakaguchi, Naoya Ishibashi, Osamu Abe, Tadatoshi Takayama, Hisashi Nakayama, Shunichi Matsuoka, Kazushige Nirei, Hitomi Nakamura, Masahiro Ogawa, Masahiko Sugitani 
World J Gastroenterol 21(17):5432-5441. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5432