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Open-Access Journal
Minireviews
Basic Study
Case Control Study
Retrospective Cohort Study
Jan Sperl, Sona Frankova, Renata Senkerikova, Magdalena Neroldova, Vaclav Hejda, Miroslava Volfova, Dusan Merta, Ondrej Viklicky, Julius Spicak, Milan Jirsa 
World J Gastroenterol 21(18):5496-5504. Published online May 14, 2015. doi: 10.3748/wjg.v21.i18.5496
Retrospective Study
Chin Hur, Sung Eun Choi, Chung Yin Kong, Gui-Qi Wang, Hong Xu, Alexandros D Polydorides, Li-Yan Xue, Katherine E Perzan, Angela C Tramontano, Rebecca R Richards-Kortum, Sharmila Anandasabapathy 
World J Gastroenterol 21(18):5513-5523. Published online May 14, 2015. doi: 10.3748/wjg.v21.i18.5513
Mizue Matsuura, Masahiko Inamori, Atsushi Nakajima, Yasuhiko Komiya, Yumi Inoh, Keigo Kawasima, Mai Naitoh, Yuji Fujita, Akiko Eduka, Noriyoshi Kanazawa, Shiori Uchiyama, Rie Tani, Kennichi Kawana, Setsuya Ohtani, Hajime Nagase 
World J Gastroenterol 21(18):5555-5559. Published online May 14, 2015. doi: 10.3748/wjg.v21.i18.5555
Naomi Kakushima, Hideyuki Kanemoto, Keiko Sasaki, Noboru Kawata, Masaki Tanaka, Kohei Takizawa, Kenichiro Imai, Kinichi Hotta, Hiroyuki Matsubayashi, Hiroyuki Ono 
World J Gastroenterol 21(18):5560-5567. Published online May 14, 2015. doi: 10.3748/wjg.v21.i18.5560
Clinical Trials Study
Observational Study
Prospective Study
Benjamin Terrier, Nathanael Lapidus, Stanislas Pol, Lawrence Serfaty, Vlad Ratziu, Tarik Asselah, Vincent Thibault, Jean-Claude Souberbielle, Fabrice Carrat, Patrice Cacoub 
World J Gastroenterol 21(18):5647-5653. Published online May 14, 2015. doi: 10.3748/wjg.v21.i18.5647
Randomized Controlled Trial
Systematic Reviews
Meta-Analysis
Case Report
Letters To The Editor