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Toru Mizuguchi, Tsuyoshi Saito, Nozomi Niwa, Masami Horiguchi, Masato Tamate, Seiro Satohisa, Mizue Teramoto, Masahiro Iwasaki, Ryo Koide, Ami Kikuchi 
World J Obstet Gynecol 8(1):1-7. Published online Nov 5, 2019. doi: 10.5317/wjog.v8.i1.1
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