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Open-Access Journal
Minireviews
Frank Maixner, Kaisa Thorell, Lena Granehäll, Bodo Linz, Yoshan Moodley, Thomas Rattei, Lars Engstrand, Albert Zink 
World J Gastroenterol 25(42):6289-6298. Published online Nov 14, 2019. doi: 10.3748/wjg.v25.i42.6289
Basic Study
Case Control Study
Moustafa Nouh Elemeery, Marwa Anwar Mohamed, Marwa Ahmed Madkour, Mohammed Mohammed Shamseya, Noha Mahmoud Issa, Ahmed Noah Badr, Doaa Ahmed Ghareeb, Cheol-Ho Pan 
World J Gastroenterol 25(42):6322-6341. Published online Nov 14, 2019. doi: 10.3748/wjg.v25.i42.6322
Retrospective Study
Yoko Kubosawa, Hideki Mori, Satoshi Kinoshita, Yoshihiro Nakazato, Ai Fujimoto, Masahiro Kikuchi, Toshihiro Nishizawa, Masayuki Suzuki, Hidekazu Suzuki 
World J Gastroenterol 25(42):6342-6353. Published online Nov 14, 2019. doi: 10.3748/wjg.v25.i42.6342
Observational Study
Lenke Bálint, Andrea Tiszai, Gábor Kozák, Ilona Dóczi, Veronika Szekeres, Orsolya Inczefi, Georgina Ollé, Krisztina Helle, Richárd Róka, András Rosztóczy 
World J Gastroenterol 25(42):6365-6372. Published online Nov 14, 2019. doi: 10.3748/wjg.v25.i42.6365