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Open-Access Journal
Editorial
Review
Vanja Vaccaro, Isabella Sperduti, Sabrina Vari, Emilio Bria, Davide Melisi, Carlo Garufi, Carmen Nuzzo, Aldo Scarpa, Giampaolo Tortora, Francesco Cognetti, Michele Reni, Michele Milella 
World J Gastroenterol 21(16):4788-4801. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4788
Basic Study
Eduardo José de Almeida Araújo, Larissa Marchi Zaniolo, Suellen Laís Vicentino, Marcelo Biondaro Góis, Jacqueline Nelisis Zanoni, Aristeu Vieira da Silva, Débora de Mello Gonçales Sant’Ana 
World J Gastroenterol 21(16):4829-4839. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4829
Case Control Study
Thomas Karlas, Joachim Berger, Nikita Garnov, Franziska Lindner, Harald Busse, Nicolas Linder, Alexander Schaudinn, Bettina Relke, Rima Chakaroun, Michael Tröltzsch, Johannes Wiegand, Volker Keim 
World J Gastroenterol 21(16):4894-4902. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4894
Masakatsu Fukuzawa, Junichi Uematsu, Shin Kono, Sho Suzuki, Takemasa Sato, Naoko Yagi, Yuichiro Tsuji, Kenji Yagi, Chika Kusano, Takuji Gotoda, Takashi Kawai, Fuminori Moriyasu 
World J Gastroenterol 21(16):4903-4910. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4903
Retrospective Cohort Study
Retrospective Study
Tilmann Graeter, Franziska Ehing, Suemeyra Oeztuerk, Richard Andrew Mason, Mark Martin Haenle, Wolfgang Kratzer, Thomas Seufferlein, Beate Gruener 
World J Gastroenterol 21(16):4925-4932. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4925
Shi-Yong Li, Gang Chen, Jun-Feng Du, Guang Chen, Xiao-Jun Wei, Wei Cui, Fu-Yi Zuo, Bo Yu, Xing Dong, Xi-Qing Ji, Qiang Yuan 
World J Gastroenterol 21(16):4969-4974. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4969
Clinical Trials Study
Fátima Higuera-de la Tijera, Alfredo I Servín-Caamaño, Aurora E Serralde-Zúñiga, Javier Cruz-Herrera, Eduardo Pérez-Torres, Juan M Abdo-Francis, Francisco Salas-Gordillo, José L Pérez-Hernández 
World J Gastroenterol 21(16):4975-4985. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4975
Observational Study
Marco Milone, Antonio Mollo, Mario Musella, Paola Maietta, Loredana Maria Sosa Fernandez, Olena Shatalova, Alessandro Conforti, Gianni Barone, Giuseppe De Placido, Francesco Milone 
World J Gastroenterol 21(16):4997-5001. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.4997
Prospective Study
Hiroki Sato, Haruhiro Inoue, Haruo Ikeda, Chiaki Sato, Chainarong Phlanusittepha, Bu’Hussain Hayee, Esperanza Grace R Santi, Yasutoshi Kobayashi, Shin-ei Kudo 
World J Gastroenterol 21(16):5002-5008. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5002
Yasuhiro Tamura, Yasushi Funaki, Shinya Izawa, Akihito Iida, Yoshiharu Yamaguchi, Kazunori Adachi, Naotaka Ogasawara, Makoto Sasaki, Hiroshi Kaneko, Kunio Kasugai 
World J Gastroenterol 21(16):5009-5016. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5009
Randomized Controlled Trial
Takayoshi Suzuki, Masashi Matsushima, Aya Masui, Shingo Tsuda, Jin Imai, Jun Nakamura, Yoko Tsukune, Tetsufumi Uchida, Hiroki Yuhara, Muneki Igarashi, Jun Koike, Tetsuya Mine 
World J Gastroenterol 21(16):5023-5031. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5023
Randomized Clinical Trial
Evidence-Based Medicine
Systematic Reviews
Maximilian Stephens, Luke F Hourigan, Mark Appleyard, George Ostapowicz, Mark Schoeman, Paul V Desmond, Jane M Andrews, Michael Bourke, David Hewitt, David A Margolin, Gerald J Holtmann 
World J Gastroenterol 21(16):5056-5071. Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5056
Meta-Analysis
Case Report