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Hirotaka OTA
Department of Obstetrics and Gynecology, Akita University School of Medicine
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Shinichi IGARASHI
Department of Obstetrics and Gynecology, Koto General Hospital
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Junichi HATAZAWA
Department of Obstetrics and Gynecology, Akita University School of Medicine
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Toshinobu TANAKA
Department of Obstetrics and Gynecology, Akita University School of Medicine