Funding for this research was provided by:
Iran University of Medical Sciences (96-03-30-30735)
Text and Data Mining valid from 2019-04-13
Received: 9 February 2019
Accepted: 8 April 2019
First Online: 13 April 2019
Compliance with ethical standards
: The authors declare there is no conflict of interests.
: All of the ethical standards were approved by the responsible committee (Iran University of Medical Sciences, Faculty of Medicine).
: All participants or their parents, whenever needed, signed informed consent forms.