Funding for this research was provided by:
Iran National Science Foundation (97011516)
Ferdowsi University of Mashhad (3/48253)
Text and Data Mining valid from 2020-02-06
Accepted: 30 January 2020
First Online: 6 February 2020
Compliance with ethical standards
: No potential conflicts of interest were disclosed.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.