Text and Data Mining valid from 2020-02-27
Received: 25 November 2019
Accepted: 6 February 2020
First Online: 27 February 2020
Ethics approval and consent to participate
: Ethical approval for the study was obtained from Research Ethics Committee (REC) at KFSHRC in Riyadh.
: Not applicable.
: The authors declare that they have no competing interests