Received: 12 September 2019
Accepted: 28 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board at King Abdullah International Medical Research Center. All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee. Informed written consent was obtained from all participants.
: The authors declare that they have no competing interests.