Received: 10 June 2019
Accepted: 19 December 2019
First Online: 14 January 2020
Ethics approval and consent to participate
: All subjects were informed of the general aim of the study and their participation was fully voluntary. Informed consent had been obtained and approved by the ethics committee for clinical research of faculty of medicine ASU. Date of Ethical Approval: 6/7/2016. Reference Number: FMASU Msc 260/2016.
: Not applicable.
: The authors declare that they have no competing interests.