Text and Data Mining valid from 2019-05-01
Received: 5 January 2019
Accepted: 11 April 2019
First Online: 1 May 2019
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Ministry of the Environment’s Institutional Review Board on Epidemiological Studies and by the Ethics Committee of all participating institutions. Written informed consent was obtained from all participating women and their partners.
: Not applicable.
: The authors declare that they have no competing interests.
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