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Open-Access Journal
Editorial
Basic Study
Case Control Study
Agnieszka Piatek-Guziewicz, Agata Ptak-Belowska, Magdalena Przybylska-Felus, Pawel Pasko, Pawel Zagrodzki, Tomasz Brzozowski, Tomasz Mach, Malgorzata Zwolinska-Wcislo 
World J Gastroenterol 23(44):7849-7862. Published online Nov 28, 2017. doi: 10.3748/wjg.v23.i44.7849
Retrospective Study
Clinical Trials Study
Observational Study
Prospective Study
Meta-Analysis
Case Report
Ivan Ivanovski, Miloš Ješić, Ana Ivanovski, Livia Garavelli, Petar Ivanovski 
World J Gastroenterol 23(44):7930-7938. Published online Nov 28, 2017. doi: 10.3748/wjg.v23.i44.7930
Zhi-Jun Zhu, Lin Wei, Wei Qu, Li-Ying Sun, Ying Liu, Zhi-Gui Zeng, Liang Zhang, En-Hui He, Hai-Ming Zhang, Ji-Dong Jia, Zhong-Tao Zhang 
World J Gastroenterol 23(44):7939-7944. Published online Nov 28, 2017. doi: 10.3748/wjg.v23.i44.7939