Funding for this research was provided by:
not applicable (not applicable)
Text and Data Mining valid from 2019-11-21
Received: 27 May 2019
Accepted: 2 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: The study was approved by Faculty of Medicine, Ain Shams University Ethical Committee.
: Not applicable
: The authors declare that they have no competing interests.