Funding for this research was provided by:
Qatar National Research Fund (5-221-3-064)
Received: 27 April 2018
Accepted: 5 June 2019
First Online: 26 June 2019
Ethics approval and consent to participate
: Ethical approvals were granted from Weill Cornell Medicine-Qatar (IRB number: 13–00074), Hamad Medical Corporation-Qatar (IRB number: 11345/11), and University College London, London; UCL Research Ethics Committee (Project ID: 1020/001). Verbal informed consent was obtained. Signature was waived to protect the confidentiality of the participants [in accordance with the code 45 CFR 46.117(c)(1)] [CitationRef removed].
: Consent was obtained from participants for anonymous quotes to be published in peer reviewed journal publications.
: The authors declare that they have no competing interests.