Funding for this research was provided by:
Iran University of Medical Sciences (95-04-27-29882 I has recieved little money (about 450$) for performing stages (type-print-transportation and so on) of this project)
Text and Data Mining valid from 2019-05-16
Received: 26 January 2019
Accepted: 1 April 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: The study was approved by the ethics committee of Iran University of Medical Sciences, Tehran, Iran (Ethical Approval Code: 1395.95.04.27.29882). All participants were informed about the study objectives and voluntary nature of their participation. Also, a consent form was obtained from them. They were assured that their voices were kept secured and coded according to each participant’s identification number.
: Not applicable.
: The authors declare that they have no competing interests.
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