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. 2022 Jul 20:jfac058. doi: 10.1093/jalm/jfac058

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American Association for Clinical Chemistry 2022.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Trends in study design and patient and setting characteristics in studies included in the review. DFA, direct fluorescent antibody test; IFA, immunofluorescence assay; NP, nasopharyngeal.