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Basic Study
Retrospective Cohort Study
Mineo Iwatate, Tomoyuki Kitagawa, Yasumi Katayama, Naohiko Tokutomi, Shinichi Ban, Santa Hattori, Noriaki Hasuike, Wataru Sano, Yasushi Sano, Masaya Tamano 
World J Gastroenterol 23(42):7609-7617. Published online Nov 14, 2017. doi: 10.3748/wjg.v23.i42.7609
Observational Study
Raissa Djoufack, Scarlett Se Yun Cheon, Aisha Mohamed, Fatou Faye, Korka Diouf, Richard Colvin, James Morrill, Ann-Marie Duffy-Keane, Ponni Perumalswami, Gonzague Jourdain, Dahlene Fusco 
World J Gastroenterol 23(42):7626-7634. Published online Nov 14, 2017. doi: 10.3748/wjg.v23.i42.7626
Systematic Reviews