Funding for this research was provided by:
Shiraz University of Medical Sciences (96-15524)
Received: 14 November 2018
Accepted: 9 May 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: The research protocol was approved by the Human Ethics Review Committee of the School of Dentistry, Shiraz University of Medical Sciences (n# IR.SUMS.REC.1396.S836). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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