Text and Data Mining valid from 2019-05-23
Received: 25 April 2019
Accepted: 18 May 2019
First Online: 23 May 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the Institutional Review Board at Al Neelain University. Principal investigator obtained written informed consent from all participants prior to their inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.