Received: 30 January 2020
Accepted: 11 February 2020
First Online: 25 February 2020
Ethics approval and informed consent
: Written informed consent was obtained from all participants. The study was approved by the Biomedical Ethics Committee at King Abdulaziz University, and was conducted in accordance with the ethical standards of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.