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Jun Takeda
Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan
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Satoru Takeda
Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan Aiiku Research Institute for Maternal, Child Health and Welfare, Imperial Gift Foundation Boshi-Aiiku-Kai, Tokyo, Japan
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Wakako Hikiji
Tokyo Medical Examiner's Office, Tokyo Metropolitan Government, Tokyo, Japan