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Research funding: Cruinn Diagnostics contributed to the cost of the assay kits.
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Author contributions: JJB conceived the study. AG was involved in protocol development, gaining ethical approval, experimental work and data analysis. JJB wrote the first draft of the manuscript. All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: Authors state no conflict of interest.
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Informed consent: Not applicable.
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Ethical approval: This research has been approved by the CHI at Temple St Research and Ethics Committee (REC number 21.008).
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