Received: 7 March 2018
Accepted: 3 May 2019
First Online: 21 May 2019
Ethics approval and consent to participate
: The study has received Research Ethics Approval No. QU-IRB 697-E/16 issued by Institutional Review Board, Office of Academic Research, Qatar University. The study procedures were conducted after the consent of all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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