Text and Data Mining valid from 2018-04-12
Received: 5 November 2017
Revised: 2 March 2018
Accepted: 15 March 2018
First Online: 12 April 2018
Ethics approval and consent to participate
: The institutional research board (IRB) at King Abdulla International Medical Research Centre (KAIMRC), Saudi Arabia, approved this study. All donors of placentae and blood samples gave written informed consent.
: All authors agreed to publish this manuscript.
: The authors declare that they have no competing interests.
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