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Open-Access Journal
Editorial
Kanwarpreet Tandon, Mohamad Imam, Bahaa Eldeen Senousy Ismail, Fernando Castro 
World J Gastroenterol 21(5):1371-1376. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1371
Review
Manuela Marzo, Carla Felice, Daniela Pugliese, Gianluca Andrisani, Giammarco Mocci, Alessandro Armuzzi, Luisa Guidi 
World J Gastroenterol 21(5):1394-1403. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1394
Fany Karina Segura-López, Alfredo Güitrón-Cantú, Javier Torres 
World J Gastroenterol 21(5):1414-1423. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1414
Minireviews
Jean-Noël Freund, Isabelle Duluc, Jean-Marie Reimund, Isabelle Gross, Claire Domon-Dell 
World J Gastroenterol 21(5):1436-1443. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1436
Basic Study
Fei Wei, Mu-Xin Wei, Masataka Murakami 
World J Gastroenterol 21(5):1444-1456. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1444
Jeong Mo Bae, Tae Hun Lee, Nam-Yun Cho, Tae-You Kim, Gyeong Hoon Kang 
World J Gastroenterol 21(5):1457-1467. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1457
Sen Hu, Zeng-Kai Zhao, Rui Liu, Hai-Bin Wang, Chun-Yu Gu, Hong-Min Luo, Huan Wang, Ming-Hua Du, Yi Lv, Xian Shi 
World J Gastroenterol 21(5):1468-1478. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1468
Bo Gong, Wan-Wei Liu, Wen-Jing Nie, Dong-Feng Li, Zi-Jun Xie, Chao Liu, Yan-Hui Liu, Ping Mei, Zi-Jun Li 
World J Gastroenterol 21(5):1488-1497. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1488
Lei Xu, Zeng Tu, Ge Xu, Jie-Li Hu, Xue-Fei Cai, Xing-Xing Zhan, Yu-Wei Wang, Yuan Huang, Juan Chen, Ai-Long Huang 
World J Gastroenterol 21(5):1498-1509. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1498
Ping Li, Xu-Dong Tang, Zheng-Xu Cai, Juan-Juan Qiu, Xue-Lian Lin, Tong Zhu, Lawrence Owusu, Hui-Shu Guo 
World J Gastroenterol 21(5):1518-1530. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1518
Dong-Hong Lu, Xiao-Yun Guo, Shan-Yu Qin, Wei Luo, Xiao-Li Huang, Mei Chen, Jia-Xu Wang, Shi-Jia Ma, Xian-Wen Yang, Hai-Xing Jiang 
World J Gastroenterol 21(5):1531-1545. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1531
Case Control Study
Hiroshi Yamauchi, Mitsuhiro Kida, Kosuke Okuwaki, Shiro Miyazawa, Tomohisa Iwai, Shuko Tokunaga, Miyoko Takezawa, Hiroshi Imaizumi, Wasaburo Koizumi 
World J Gastroenterol 21(5):1546-1553. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1546
Retrospective Cohort Study
Wei Yang, Kun Yan, Gong-Xiong Wu, Wei Wu, Ying Fu, Jung-Chieh Lee, Zhong-Yi Zhang, Song Wang, Min-Hua Chen 
World J Gastroenterol 21(5):1554-1566. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1554
Retrospective Study
Edo Oscar Aarts, Bas van Wageningen, Frits Berends, Ignace Janssen, Peter Wahab, Marcel Groenen 
World J Gastroenterol 21(5):1567-1572. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1567
Ryo Seishima, Koji Okabayashi, Hirotoshi Hasegawa, Masashi Tsuruta, Hiroki Hoshino, Toru Yamada, Yuko Kitagawa 
World J Gastroenterol 21(5):1573-1579. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1573
Ji Won Kim, Ji Bong Jeong, Kook Lae Lee, Byeong Gwan Kim, Dong Won Ahn, Jae Kyung Lee, Su Hwan Kim 
World J Gastroenterol 21(5):1580-1587. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1580
Zhao Liu, Mu-Chuan Yu, Rui Zhao, Yan-Feng Liu, Jian-Ping Zeng, Xian-Qiang Wang, Jing-Wang Tan 
World J Gastroenterol 21(5):1588-1594. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1588
Jia-Qing Gong, Yong-Kuan Cao, Yong-Hua Wang, Guo-Hu Zhang, Pei-Hong Wang, Guo-De Luo 
World J Gastroenterol 21(5):1606-1613. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1606
Observational Study
Márcia Soares-Mota, Tianny A Silva, Luanda M Gomes, Marco AS Pinto, Laura MC Mendonça, Maria Lúcia F Farias, Tiago Nunes, Andrea Ramalho, Cyrla Zaltman 
World J Gastroenterol 21(5):1614-1620. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1614
Meta-Analysis
Qing Pang, Jing-Yao Zhang, Si-Dong Song, Kai Qu, Xin-Sen Xu, Su-Shun Liu, Chang Liu 
World J Gastroenterol 21(5):1650-1662. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1650
Case Report
Mario Sarbia, Stefan Wolfer, Diana Karimi, Albert Eimiller 
World J Gastroenterol 21(5):1663-1665. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1663
Akiharu Kimura, Norihiro Masuda, Norihiro Haga, Tomokazu Ito, Kichirou Otsuka, Jyunko Takita, Hitoshi Satomura, Yuji Kumakura, Hiroyuki Kato, Hiroyuki Kuwano 
World J Gastroenterol 21(5):1670-1674. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1670
Hee-Jeong Lee, Ho-Jong Jeon, Sang-Gon Park, Chi-Young Park 
World J Gastroenterol 21(5):1675-1679. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1675
Song Gao, Xu-Dong Hu, Su-Zhen Wang, Ning Liu, Wei Zhao, Qing-Xi Yu, Wen-Hong Hou, Shuang-Hu Yuan 
World J Gastroenterol 21(5):1684-1688. Published online Feb 7, 2015. doi: 10.3748/wjg.v21.i5.1684
Letters To The Editor