Footnotes

• Handling editor Richard Body

• X @laurajoycenz

• Correction notice Since this article published online, competing interests for the authors JWP and MT have been declared.

• Contributors JP, MT and LJ provided scientific advice and authorship. LH, SA and CMF provided scientific analysis and advice. RAS and OW collected and collated data.

• Funding Health Research Council of New Zealand grant 19-234. Siemens Healthineers provided the assay kits free of charge and funding for the adjudicator.

• Competing interests JWP and MT have received consulting fees from Siemens Healthineers.Nothing else to disclose. Siemens Healthineers had no part in protocol or manuscript writing, data analysis, or interpretation.

• 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.