Funding for this research was provided by:
Tehran University of Medical Sciences and Health Services (93-454-76)
Received: 4 March 2019
Accepted: 23 June 2019
First Online: 1 July 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Tehran University of Medical Sciences. All participants read and signed a written informed consent prior to enrollment.
: Not applicable.
: The authors declare that they have no competing interests.