Funding for this research was provided by:
Mashhad University of Medical Sciences (901033, 921941)
Text and Data Mining valid from 2019-12-23
Received: 14 June 2019
Accepted: 13 September 2019
First Online: 23 December 2019
Compliance with ethical standards
: The authors have no conflict of interest to disclose.
: Informed consent was obtained from all subjects using protocols approved by the Ethics Committee of the Mashhad University of Medical Sciences.