Received: 4 June 2018
Accepted: 29 January 2019
First Online: 4 February 2019
Ethics approval and consent to participate
: This study was exempted from review by the College of Medicine Institutional Review Board at Taibah University.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.