Funding for this research was provided by:
Merck for Mothers
Received: 2 June 2017
Accepted: 26 June 2018
First Online: 6 July 2018
Ethics approval and consent to participate
: The study was approved by Ethics Committee of the Faculty of Medicine—Alexandria University and the El Galaa Maternity Teaching Hospital Ethical Committee. Written consent was obtained from each subject.
: Not applicable.
: The authors declare that they have no competing interests.
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