Funding for this research was provided by:
Chief Scientist Office (PDF/15/06)
Text and Data Mining valid from 2019-01-26
Received: 24 October 2018
Accepted: 11 January 2019
First Online: 26 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: No human or animal participants were involved in this study.
: Informed consent was not necessary as no human subjects were involved in the study.