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Open-Access Journal
Review
Yi Dong, Andrej Potthoff, Christoph Klinger, Ana Paula Barreiros, Dariusz Pietrawski, Christoph F Dietrich 
World J Gastroenterol 24(15):1583-1590. Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1583
Minireviews
Kenya Kamimura, Ryosuke Inoue, Takuro Nagoya, Norihiro Sakai, Ryo Goto, Masayoshi Ko, Yusuke Niwa, Shuji Terai 
World J Gastroenterol 24(15):1616-1621. Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1616
Basic Study
Yusuke Ozawa, Takafumi Tamura, Yohei Owada, Yoshio Shimizu, Akira Kemmochi, Katsuji Hisakura, Takashi Matsuzaka, Hitoshi Shimano, Hiroko Isoda, Nobuhiro Ohkohchi 
World J Gastroenterol 24(15):1622-1631. Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1622
Retrospective Study
Toshio Kuwai, Toshiki Yamaguchi, Hiroki Imagawa, Ryoichi Miura, Yuki Sumida, Takeshi Takasago, Yuki Miyasako, Tomoyuki Nishimura, Sumio Iio, Atsushi Yamaguchi, Hirotaka Kouno, Hiroshi Kohno, Sauid Ishaq 
World J Gastroenterol 24(15):1632-1640. Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1632
Observational Study
Meta-Analysis
Quirino Lai, Fabio Melandro, Zoe Larghi Laureiro, Francesco Giovanardi, Stefano Ginanni Corradini, Flaminia Ferri, Redan Hassan, Massimo Rossi, Gianluca Mennini 
World J Gastroenterol 24(15):1658-1665. Published online Apr 21, 2018. doi: 10.3748/wjg.v24.i15.1658