Text and Data Mining valid from 2018-04-24
Received: 22 October 2017
Accepted: 17 April 2018
First Online: 24 April 2018
Ethics approval and consent to participate
: The Ethics Committee of Tehran University of Medical Sciences, Tehran, Iran, approved this study. Agreement to participate and a signed consent form were obtained from all infertile couples before data collection.
: The authors declare that they have no competing interests.
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