Received: 17 January 2019
Accepted: 7 June 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: The protocol was approved by the Ethics Committee of the University of Damascus.The members of the Ethics Committee are deans of the Faculties of Medicine, Pharmacy, Law, Sharia in Damascus University.
: Not applicable.
: The authors declare that they have no competing interests.