?:authorAffiliation
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[\'Perinatal Center for Maternity and Neonates, Yokohama City University Medical Center, Yokohama, Japan.\', \'Department of Biostatistics, Yokohama City University School of Medicine, Yokohama, Japan.\', \'Department of Obstetrics and Gynecology, Yokohama City University Hospital, Yokohama, Japan.\']
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