Text and Data Mining valid from 2019-08-05
Received: 29 June 2018
Accepted: 28 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all participants prior to data collection. The study was approved Damascus University Ethical Committee for Medical Faculties.
: Not applicable.
: The authors declare that they have no competing interests.