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Ken ISHITANI
Department of Obstetrics and Gynecology, Tokyo Women's Medical University
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Fumi HORIGUCHI
Department of Obstetrics and Gynecology, School of Medicine, Keio University
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Chieko MUSHA
Department of Obstetrics and Gynecology, Tokyo Women's Medical University
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Kazuya MAKITA
Department of Obstetrics and Gynecology, School of Medicine, Keio University
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Hiroaki OHTA
Department of Obstetrics and Gynecology, Tokyo Women's Medical University