Funding for this research was provided by:
Ministry of Environmental Protection
Received: 3 October 2017
Accepted: 3 January 2018
First Online: 12 January 2018
Ethics approval and consent to participate
: The Helsinki committee of Assuta Medical Center approved the study protocol. For the retrospective study, the committee granted exemption from informed consent since it includes de-identified electronic medical records. For the nested field study, informed consent will be obtained from all women upon recruitment.
: Not applicable
: The authors declare that they have no competing interests.
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