Funding for this research was provided by:
Shahid Beheshti University of Medical Sciences (6618)
Received: 30 April 2018
Accepted: 20 September 2018
First Online: 27 September 2018
Ethics approval and consent to participate
: All the ethical aspects of this study were proved by the Shahid Beheshti University of Medical Sciences #IR.SBMU.PHNS.REC.66000433.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.