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Kazuya Akahoshi, Shinichi Tamura, Kazuaki Akahoshi, Yoriko Kaneshiro, Reiichi Sashihara, Kento Uemura, Kenta Sato 
World J Gastrointest Endosc 13(4):111-114. Published online Apr 16, 2021. doi: 10.4253/wjge.v13.i4.111
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