Article History
Received: 2 November 2016
Accepted: 24 March 2017
First Online: 27 March 2017
Compliance with Ethical Standards
:
: All authors declares that they have no conflict of interest.
: This study was approved by the Directorate of Health Affairs, National Committee of Medical and Bioethics, Ministry of Health, Jeddah, Kingdom of Saudi Arabia.
: All subjects, or their legal guardian, had previously granted consent to the use of relevant data.