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Contributors All authors contributed to the conceptualisation and methods described and critically reviewed and revised the manuscript. SARD is responsible for the overall content as guarantor.
Funding This work was made possible by Programme Grant number NPRP-BSRA01-0406-210030 from the Qatar National Research Fund (a member of Qatar Foundation).
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.