Updates are available Correction dated 2021-05-21
Click to view Correction: https://doi.org/10.1186/s12889-021-11049-4
Updates are available Correction dated 2020-08-03
Click to view Correction: https://doi.org/10.1186/s12889-020-09314-z
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Authors
Yonemoto, Naohiro http://orcid.org/0000-0003-3637-2095
Suzuki, Shunji
Sekizawa, Akihiko
Hoshi, Shinichi
Sagara, Yoko
Itabashi, Kazuo
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Funding
Funding for this research was provided by:
Ministry of Health, Labour and Welfare (201807019A, 201807019A)
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More Information
Article History
Received: 25 March 2020
Accepted: 14 July 2020
First Online: 31 July 2020
Change Date: 3 August 2020
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s12889-020-09314-z
Change Date: 21 May 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/s12889-021-11049-4
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Japan Association of Obstetricians and Gynecologists. The survey was institutional and contained no individual information (pregnant women or children).
: Not applicable.
: NY is a member of Editorial Board. SS, AS, SH, YS, and KI declare that they have no competing interests.
