Funding for this research was provided by:
Received: 8 March 2022
Accepted: 9 June 2022
First Online: 18 June 2022
: Anonymised patient sample residues retrieved solely for quality control purposes were used as positive controls for assay evaluation, in accordance with local guidelines. This type of usage is not subject to review under the Swedish Act on Ethical Review of Research Involving Humans (2003:460). Therefore, no ethics approval was required.
: Not applicable.