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Editorial
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Review
Saleh A Naser, Melissa Arce, Anam Khaja, Marlene Fernandez, Najih Naser, Sammer Elwasila, Saisathya Thanigachalam 
World J Gastroenterol 18(5):412-424. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.412
Original Article
Hiroaki Takeuchi, Ya-Nan Zhang, Dawn A Israel, Richard M Peek Jr, Mikio Kamioka, Hideo Yanai, Norihito Morimoto, Tetsuro Sugiura 
World J Gastroenterol 18(5):425-434. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.425
Ping Zhou, Jie Xia, Gang Guo, Zi-Xing Huang, Qiang Lu, Li Li, Hong-Xia Li, Yu-Jun Shi, Hong Bu 
World J Gastroenterol 18(5):435-444. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.435
Brief Article
Zulfu Arikanoglu, Erhan Aygen, Cemalettin Camci, Sami Akbulut, Murat Basbug, Osman Dogru, Ziya Cetinkaya, Cuneyt Kirkil 
World J Gastroenterol 18(5):453-457. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.453
Tao Zhang, Xue-Yan Xu, Hang Zhou, Xin Zhao, Meng Song, Tao-Tao Zhang, He Yin, Ting Li, Peng-Tao Li, Da-Yong Cai 
World J Gastroenterol 18(5):472-478. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.472
Letters To The Editor
Jannis Kountouras, Christos Zavos, Georgia Deretzi, Emmanuel Gavalas, Dimitrios Chatzopoulos, Panagiotis Katsinelos, Elena Tsiaousi, Stergios Gagalis, Stergios A Polyzos, Ioannis Venizelos 
World J Gastroenterol 18(5):489-490. Published online Feb 7, 2012. doi: 10.3748/wjg.v18.i5.489