Article History
Received: 5 October 2017
Accepted: 18 July 2018
First Online: 2 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the College of Medicine, King Saud University and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.