Received: 19 October 2017
Accepted: 6 September 2018
First Online: 14 September 2018
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the local ethics committee of our institution, Shiraz University of Medical Sciences.
: Not applicable.
: The authors declare that they have no competing interests.
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