Funding for this research was provided by:
Shahid Chamran University of Ahvaz (96/3/02/16670)
Text and Data Mining valid from 2019-01-07
Received: 3 September 2018
Revised: 19 November 2018
Accepted: 27 December 2018
First Online: 7 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: This article does not contain patient data.