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Yuji Sakai, Masayuki Ohtsuka, Harutoshi Sugiyama, Rintaro Mikata, Shin Yasui, Izumi Ohno, Yotaro Iino, Jun Kato, Toshio Tsuyuguchi, Naoya Kato 
World J Gastroenterol 27(15):1569-1577. Published online Apr 21, 2021. doi: 10.3748/wjg.v27.i15.1569
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