Funding for this research was provided by:
Vice Chancellor for the Research of Babol University of Medical Sciences (9603612)
Text and Data Mining valid from 2019-04-10
Received: 1 February 2019
Accepted: 2 April 2019
First Online: 10 April 2019
Compliance with ethical standards
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This study was funded by the Vice Chancellor for the Research of Babol University of Medical Sciences (grant number 9603612).
: Informed consent was obtained from all individual participants included in the study.