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Erratum to: The use of balloons for uterine cervical ripening is associated with an increased risk of umbilical cord prolapse: population based questionnaire survey in Japan

Crossref DOI link: https://doi.org/10.1186/s12884-016-0948-2

Published Online: 2016-07-12

Published Print: 2016-12

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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