Text and Data Mining valid from 2018-08-30
Received: 28 April 2018
Revised: 13 August 2018
Accepted: 19 August 2018
First Online: 30 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The present study was approved by the Semnan University of Medical Sciences, Iran.
: Written informed consent was not necessary for this study. Patient data were anonymous for the purposes of this analysis, and all confidential patients’ information was protected in accordance with the Iranian law.