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Open-Access Journal
Editorial
Anastasios Koulaouzidis, Dimitris K Iakovidis, Alexandros Karargyris, Emanuele Rondonotti 
World J Gastroenterol 21(17):5119-5130. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5119
Andrea Ferrigno, Laura G Di Pasqua, Clarissa Berardo, Plinio Richelmi, Mariapia Vairetti 
World J Gastroenterol 21(17):5131-5137. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5131
Topic Highlight
Antonio Facciorusso, Matteo Antonino, Marianna Di Maso, Michele Barone, Nicola Muscatiello 
World J Gastroenterol 21(17):5149-5157. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5149
Sung-Eun Kim, Hee Young Paik, Hyuk Yoon, Jung Eun Lee, Nayoung Kim, Mi-Kyung Sung 
World J Gastroenterol 21(17):5167-5175. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5167
Review
Kenya Kamimura, Hiroyuki Abe, Hirokazu Kawai, Hiroteru Kamimura, Yuji Kobayashi, Minoru Nomoto, Yutaka Aoyagi, Shuji Terai 
World J Gastroenterol 21(17):5183-5190. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5183
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
Hong-Bo Shi, Hai-Qing Sun, Hong-Lin Shi, Feng Ren, Yu Chen, De-Xi Chen, Jin-Li Lou, Zhong-Ping Duan 
World J Gastroenterol 21(17):5250-5258. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5250
Retrospective Study
Hirohito Mori, Maki Ayaki, Hideki Kobara, Shintaro Fujihara, Noriko Nishiyama, Tae Matsunaga, Tatsuo Yachida, Tsutomu Masaki 
World J Gastroenterol 21(17):5281-5286. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5281
Jun Gao, Shao-Hong Wang, Xue-Mei Ding, Wen-Bing Sun, Xiao-Long Li, Zong-Hai Xin, Chun-Min Ning, Shi-Gang Guo 
World J Gastroenterol 21(17):5287-5294. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5287
Ling-Fei Luo, Kun Qiao, Xiao-Guang Wang, Ke-Ying Ding, Hua-Ling Su, Cui-Zhen Li, Hong-Jing Yan 
World J Gastroenterol 21(17):5295-5302. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5295
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
Meta-Analysis
Bin Xu, Bo Xu, Wen-Yan Zheng, Hai-Yan Ge, Li-Wei Wang, Zhen-Sun Song, Bin He 
World J Gastroenterol 21(17):5393-5406. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5393
Case Report
José Miranda-Bautista, Alejandro Fernández-Simón, Isabel Pérez-Sánchez, Luis Menchén 
World J Gastroenterol 21(17):5417-5420. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5417
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
Yong Mei, Ci-Jun Peng, Li Chen, Xiong-Xiong Li, Wei-Nan Li, De-Jun Shu, Wan-Tao Xie 
World J Gastroenterol 21(17):5442-5444. Published online May 7, 2015. doi: 10.3748/wjg.v21.i17.5442