Mehrpisheh, Shahrokh
Memarian, Azadeh
Mahyar, Abolfazl
Valiahdi, Negin Sadat
Article History
Received: 8 November 2017
Accepted: 2 May 2018
First Online: 26 May 2018
Ethics approval and consent to participate
: The study is approved by ethical committee of Qazvin University of Medical Sciences. Written consent was obtained from the parents of the participants in this study.
: The authors declare that they have no competing interests.
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